0!> - Replica Weapon Plans and Blueprints
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1. Extraction o the case The extractor which is fitted on the right side ol the bolt performs this operation by direct extraction for the withdrawal ol the case see above phase position 3 to position 4 b Ejection The ejector is of the fixed type and is fitted in the trigger guard at the rear of the magazine It protudes in a groove cut at the left and in the underside of the bolt At the end oi the rearward motion 3d phase the case strikes against the ejector and being compelled to pivot around the extractor is ejected rightwards There exist other types of ejectors but the type choosen for the F N rifle has the great advantage to help the shooter to know how his rifle is working as the ejection occurs nearly at the end of the travel of the bolt to the rear at the moment when its is at the point to be stopped against the rear wall of the receiver Fig 8 A violent ejection shows that the recoil motion develops at a too great velocity and with a needless violence to perform the functioning with the consequence that the wear and tear of the mechanism is amplified Thanks to the regulator it is then RD very easy to ensure with a thorough knowledge of the where abouts a perfect functioning of th rifle With ejectors which are fiited elastically on the receiver this cannot be reached c Introduction of a cartridge The bolt has two ribs on its lower side these ribs when the2. In order to strip the bolt carrier catch with the help of the point of a bullet depress the bolt carrier catch spring this will allow to turn the bolt carrier catch body outwards Remove the spring remove the catch by raising it remove bolt carrier catch stop STRIPPING OF THE HANDGUARD Unscrew front end cap screw Remove front end cap from the front Remove front part of handguard swinging its front end upwards Unscrew lower band screw which will free swivel lower band is so able to open Remove lower band from the front Remove rear part of handguard swinging its front end upwards STRIPPING THE GAS REGULATOR SLEEVE With the handguard removed it is only necessary to unscrew gas regulator leeve using if necessary gas regulator key Remove gas regulator sleeve STRIPPING THE BARREL RECEIVER ASSEMBLY Unscrew trigger guard stop screws unscrew and remove trigger guard screws the barrel receiver assembly may thus be removed from the stock remove cover plate raise its front end in order to disengage it from its groove and swing the cover 90 In the case of rifles fitted for the full automatic firing with the barrel receiver assembly removed from the stock it is possible to remove the safety sear from the receiver Depress safety sear forwards and at the same time disengage safety sear from its housing by raising it The safety sear and its spring are thus free STRIPPING OF THE TRI
3. F N MODEL 49 SELF LOADING RIFLE USER S MANUAL Fabrique Nationale d Armes de Guerre Societe Anonyme HERSTAL LEZ LIEGE BELGIUM 4 gt mata epis 1460 eju N 4 1 D d mata apts yal eju butpoolJleS N d H 013 GENERAL CHARACTERISTICS The F N Self loading Rifle is a shoulder weapon which has been developed to use the infantry cartridges i e rimless cartridges of a calibre of about 8 mm 7 mm 7 5 mm 7 65 mm 7 9 mm 30 developing a muzzle energy of approximately 350 kgm This rifle can be manufactured for all above mentioned ammunitions and calibers Method of operation It is self loading rifle ie that the following operations are automatically performed without interference of the shooter Unlocking the mechanism Extraction and ejection of the fired case Cocking the hammer Feeding a cartridge into the chamber Locking the mechanism The Standard type of the F N Self loading Rifle is designed as to deliver single shot fire only On specia request however this rifle may be designed as to be able to deliver either single shot or fuu automatic fire Locked weapon The rifle is locked and the opening o the mechanism can only occur when there is practically no more pressure in the chamber This makes the extraction of the fired case more easy and ensures a more regular functioning as it is less sensible to unavoidab
4. Piston Piston return Spring Receiver Receiver Body Locking Shoulder Safety Sear for automatic firing Safety Sear Spring Rest Spring Rest Axis Pin Safety Sear Spring Cover Plate complete Cover Plate Body Cover Plate Stud Bolt y o4 4 Extractor Extractor Spring E Firing Pin Rear End Firing Pin Spring Firing Pin Safety Stop Bolt Carrier Firing Pin Front Trigger Guard Hammer complete Hammer Body Hammer Spring Guide Hammer Spring Guide Axis Pin Quant per Gun W Number part 232 232A 232B 232C 232D 232E 232F 34 34A 34B 3o 36 37 38 39 239 40 41 42 43 43A 43B 43C 44 45A 45B 46 46A 46B 46C 46D 46E 46F 46G 51 52 53 54 55 56 57 58 60 60 60B NAME Quant per Gun Automatic Fire Lever l Automatic Fire Lever Body Automatic Fire Lever Arm Automatic Fire Lever Arm Plunger Automatic Fire Lever Arm Stop Automatic Fire Lever Stud Automatic Fire Lever Locking Screw Hammer Spring Hammer outer Spring Hammer inner Spring Hammer Axis Pin Trigger Trigger Spring Trigger Spring Plunger Auxiliary Sear Auxiliary Sear Spring Auxiliary Sear Spring Plunger Trigger Axis Pin Bolt Stop complete Holding Open Device Bolt Bolt Stop Spring Bolt Stop Washer Bolt Stop Retainer Bolt Stop Retainer Plunger Bolt Stop Retainer Plunger SE Safety complete Safety Body Safety Lever Safety Spring Plunge
5. liberated are attached to the receiver the upper part of the receiver is fitted to secure the receiver cover The underside of the receiver has three threaded holes for the screws assembling the receiver to the stock and to the trigger guard 2 MECHANISM 2 22 23 24 25 26 27 227 28 Extractor Extractor Spring Firing Pin Front End Firing Pin Spring Firing Pin Safety Stop Bolt Carrier Firing Pin Rear End The bolt houses the extractor and its spring the firing pin and its spring and firing pin safety stop It has one lug at the front and two lugs at the rear These two lugs cammed by the Component used for rifles allowing single shot and full automatic fire 4 slopes cut in the bolt carrier perform the locking and the unlocking of the bolt The bolt is recessed on its upper side to take the ront lug of the bolt carrier this allows the bolt carrier to carry the bolt rearwards when recoiling At the rear the bolt has a flat surface which bears against the locking shoulder located in the receiver in order to lock the mechanism The firing pin and its spring are kept in position by the extractor spring stud engaging in the slot cut in firing pin rear end The firing pin safety stop prevents the protrusion ol the firing pin until the bolt is properly locked The bolt carrier against which strikes the rear end of the pis
6. taking care that sear spr ng is placed in its housing Put the protective cover into position from the right vertically and give it a quarter turn clockwise Replace receiver and barrel in position on the stock Replace and screw fully in trigger guard screws and stop screws ASSEMBLING GAS REGULATOR SLEEVE Screw regulator sleeve on gas cylinder with the retaining spring to the rear Use key if necessary ASSEMBLING HANDGUARD Replace handguard rear part inserting first its rear end into the groove cut in the receiver replace lower band and swivel W 44 screw in lower band screw Replace handguard front part inserting first its rear end under lower band Replace front end cap as to fix front end of handguard and screw in front end cap screw ASSEMBLING THE COVER Replace bolt carrier stop replace bolt carrier catch stop and bolt carrier catch spring in their housing in the bolt carrier stop Place bolt carier catch axis in its housing in the cover at an angle of about 60 depress bolt carrier catch stop and turn bolt carrier stop home To assemble the rear sight replace sight aperture Replace rearsight slide lock spring in sight slide replace slide lock in sight slide taking care that the crosspieces are opposite Depress slide lock and replace slide assembly on sear leaf taking care that the figures of the sight are turned the same side as the slide cross piece Make sure that sliding the slide along th
7. to make sure by mere feeling if the hammer is cocked or not d Safety The safety 46 is located on the side of the trigger guard it is consequently very easily accessible and is easily actuated without removing the hand from the butt As the angle between the positions Fire and Safety is important the safety is easily felt in the dark and even visible from a certain distance The arm of the safety is fitted inwardly with a spring plunger which fixes it in the selected position In the lt safety gt position the safety works like a skid against the trigger in such a way that the more the action on the trigger is sharp the more the safety is confirmed Full automatic fire In rifle equiped for full automatic fire the working of the action is different from that of the single shot lire in the following points _ the automatic fire lever 232 is located in the position A the cylin drical part of the lever body is in contact with the tang of the auxiliary sear 239 and prevents the sear to pivot forward when the trigger is depressed The engagement of the hammer 231A by the auxiliary sear is consequently impos sible when the trigger is depressed In other words the auxiliary sear 239 is switched out and does not interfere any more in the action On the other hand as long as the trigger is depressed ihe main sear being no more in the way of the hammer 231 this is not catched after each
8. AND THE CLOSING OF THE MECHANISM IS OPERATED The components acting in this phase are the receiver 15 or 215A the bolt 21 the bolt carrier 27 or 227 the return spring 67A 2 pieces and D the cover 65 The bolt carrier 27 227 moves along the receiver 15 or 215A It is pushed rearwards by the piston 12 and is forced forwards by the 2 piece return spring 67A The bolt is in one piece and its positive locking is performed when its flat surface at the rear is in line with the locking shoulder made in treated steel and pressed in the receiver at the rear of the magazine The respective motions of the bolt and of the bolt carrier are controlled as follows When the cartridge is fired position 1 the bolt is in its locking position A and is located in this position by the contact of surface B of the bolt carrier The opening operation may be schemed in three phases s Tg masani 8T OSS Fig 2 First Phase position 1 to position 2 Break of contact of the surface at B The bolt is still locked A while the pressure in barrel is dropping Position 2 Fig 3 Second Phase position 2 to position 3 Unlocking of the mechanism The contact between surfaces C forces the bolt up GRO ARS 7777777 77 77 7777777727 my XY SS 46 Position 3 Fig 4 Third Phase position 3
9. Replace gas cylinder plug depressing plug catch and tum plug in such a way that letter A is turned outside Release gas cylinder plug catch ASSEMBLING THE MAGAZINE Insert magazine platform spring in magazine platform Replace magazine platform and spring in magazine take care to replace them in correct position Seize magazine and introduce magazine in trigger guard engaging first front stud of magazine in recess in trigger guard Press on magazine bottom until magazine is caught by magazine catch COMPLETE STRIPPING AND ASSEMBLY The rifle ought first to be stripped as described for the field stripping 4t COMPLETE STRIPPING OF THE RECEIVER COVER Remove the return springs by disengaging with the help of a screw driver the first coil of the inner spring from the end of its rod Separate the outer spring from the inner springs and the inner springs from their guide To strip the backsight depress tail of sight leave in order to compress the sight spring and to disengage the leave studs from the shoulders Draw back the sight leave and remove it from the cover Remove the leaf spring from its housing using the hole cut in the spring Grasp rear of leaf in right hand with the left hand grasp the sight slide and slide lock depress slide lock and remove slide and slide lock from the leaf Remove slide lock and its spring from the sight slide Unscrew the two lateral adjusting screws and remove rear sight aperture
10. The barrel is also fitted with the piston guide secured to the barrel by means of a pin The gaz cylinder is pressed on to the barrel and is localized by means of a shoulder and secured by means of its securing pin The gas cylinder plug with its plunger and plunger spring fits the front end of the gas cylinder The gas cylinder is also fitted with the gas adjusting sleeve aperture cut in the front of the receiver serves as a guide for the rear end of the piston The front end of the receiver serves as a stop for rear end of the piston retum spring Further the piston is controlled in its middle part by the piston guide The top of the receiver which houses the mechanism is completely cut open while its underside has two openings one for the hammer at the rear and one forward for the cartridges Components used for rifles allowing single shot and full automatic fire W 11 At the front of the receiver is the lead for the cartridges into the chamber At the rear of the receiver are the locking shoulder which being pressed into the receiver is a separate part so that the correct head space carr be obtained and the housings for the holding open device and for the ejector On the side the receiver is fitted with flanges in order to lead the bolt carrier H the rifle is designed to deliver single shot and full automatic fire a safety sear and its spring which forces the sear back alter the hammer has been
11. shot The main sear is however superseded by the safety sear 216 whose rear end penetrates a groove in the hammer and keeps it at the rear until the bolt carrier comes kack to its forward osition The safety sear is then pushed forwards by the bolt carrier and its spring 217 compressed The hammer is then free to be flung forward under the action of its springs 34 A B When the trigger is released the main sear which is one piece with the trigger is again in the way of the hammer and catches the hammer rearwards s opping consequently the firing 5 LOADING The reloading of the rifle as it is designed with its piston on top of the barrel is possible owing to 1 The independence of the piston and of the bolt carrier which enables the piston to move back to its location under the 34 action of its own spring as soon as it has thrown the bolt carrier rearwards 2 The action of the holding open device which holds the bolt and bolt carrier to the rear 2 lt SS dE A AA SSAA RARE Fig 13 This device 43 consists of a plunger located vertically at the rear of the magazine and in front of the bolt when the bolt is in its full rearward position The spring of this plunger keeps the plunger downward in its housing ifthe trigger guard and consequently out of the functioning of the weapon as long as there are cartridges in the magazine When the last cartridge has been fired and the bolt has t
12. to position 4 Direct opening The bolt and the bolt carrier are travelling together rearwards owing to the contact of surfaces F When the parts are stopped at the rear they are in position 4 the double retum spring is compressed 71 2 im Ba Position 4 5 The closing of the mechanism may be schemed as below in 3 phases Fourth phase position 4 to position 5 Closing of the mecha nism The bolt carrier pushes the bolt forwards owing to the contact of surfaces G till the bolt is stopped by rear end of the barrel KD Yaw thy 4 E in MAS ASSEN Position 5 Fig 6 Fifth Phase position 5 to position 6 Locking of the mecha nism At this moment the slope H forces the rear part of the bolt downwards in the locking position gp ng pla g gl gg mm CUM zz Y Position 6 Fig 7 Sixth Phase position 6 to position 1 Confirmation of the locking The bolt carrier continues its movement forward and the bolt is maintained in the locking position by the surfaces B Functioning by hand The repeating cycle is identical with the automatic cycle Instead to receive the thrust of the piston the bolt carrier is operated by hand 3 FEEDING EXTRACTION EJECTION The additional parts acting in this phase are the extractor 22 and the ejector 51
13. 6 Butt Plate Trap Spring Screw The stock in one piece is made of walnut and consists of the fore end and the butt The fore end is fitted at the front to hold the cap and recessed turther back for the lower band Underneath the butt is fitted with the butt plate which is secured by means of two screws The stock is grooved to take the barrel the receiver the trigger guard the magazine and the recoil lug The housing of the rear screw of the trigger guard holds a bushing The top of the barrel is covered with a handguard fitted with a front cap and a rear cap The rear cap is seated in a recess provided in the front end of the receiver The handguard in two pieces is secured at its front end by the front end cap in the middle by the lower band and at the rear by the receiver For rifles used by snipers the stock can be fitted with a cheek piece which is secured to the stock by means of screws 4 6 MAGAZINE WITH MAGAZINE FOLLOWER AND FOLLOWER SPRING Plate X Components 60 Magazine Assembly 61 Magazine Follower 62 Magazine Follower Spring The Magazine holds 10 cartridges and can be removed from the rifle In front it is held in position in the trigger guard by means of a hook and at the rear by the magazine catch The follower spring raises the cartridges through the magazine follower deed E 7 ACCESSORIES SUPPLIED SPECIAL REQUEST Plate XI List of Accessories Bayonet Scabba
14. 9 Hammer 31 A superseded by hammer 23 Receiver body 15 superseded by receiver body 215A Bolt carrier 27 superseded by bolt carrier 227 Trigger guard 30 superseded by trigger guard 230 Stock 85 superseded by stock 285A Further on the following parts are used Safety sear 216A Safety sear spring 217 Automatic fire lever 232 See these components on fig 11 and 12 as well as the sectional view of weapon at the end of this pamphlet It ought furthermore to be noticed that 1 The weapon being on safety with the trigger locked the cocking of the rifle by hand is possible owing to the oval slot A of the hammer which is consequently able to move longitudinally 2 If the finger depresses the trigger at the moment the hammer returns backwards any shock to the finger is prevented owing to the elasticity of the linkage of the auxiliary sear b Double pull This is the result of the action of the auxiliary sear spring which resting against the trigger cooperates with the trigger spring and gives the shooter the feeling of a double pull motion 33 Cocking indicator As the hammer is completely concealed in the weapon it is desirable that there should be a way to make sure externally if the rifle is ready or not for action To this end the guide 31B of the hammer spring protrudes beneath the trigger guard when the hammer is cocked It is thus easy even in the dark
15. GGER GUARD With the trigger guard screws and their stop screws removed it is possible to remove the trigger guard assembly frum the stock In order to remove the bolt stop depzess the bolt stop retainer plunger remove bolt stop retainer bolt stop retainer plunger and its spring Remove bolt stop In order to dismount the ejector and the magazine catch and its spring remove from left to right the magazine catch axis pin In order to dismount the action let the gently down if it is cocked remove trigger axis pin remove auxiliary sear its spring and its plunger remove the trigger its spring and its plunger In the case of rifle fitted for the full automatic firing remove the automatic fire lever to this end swing it backwards vertically with the trigger remove automatic fire lever from the trigger guard In order to remove the safety after the action has been stripped swing the safety lever in the intermediate position between the safety position and the fire position remove then safety from the trigger guard STRIPPING THE STOCK To remove the various components take out their screws ASSEMBLING THE STOCK Replace the components of stock and fix them by means of their screws ASSEMBLING THE TRIGGER GUARD To replace the safety replace safety axis in the trigger guard introducing it from the right and locating the safety lever in the 3 intermediaie positi
16. Hammer body Hammer Spring Guide Hammer Spring Guide Axis Pin Hammer Spring Hammer outer Spring Hammer inner Spring Hammer Axis Pin Trigger Trigger Spring Trigger Spring Plunger Auxiliary Sear Auxiliary Sear Spring Auxiliary Sear Spring Plunger Trigger Axis Pin Bolt Stop complete Holding Open Device Bolt Stop Body Bolt Stop Spring Bolt Stop Washer Bolt Stop Retainer Bolt Stop Retainer Plunger Bolt Stop Retainer Plunger Spring Safety complete Ejector Magazine Catch Magazine Catch Spring Magazine Catch Axis Pin Trigger Guard Front Screw Trigger Guard Center Screw Trigger Guard Rear Screw Trigger Guard Screw Stop Screw Automatic Fire Lever Body Automatic Fire Lever Arm Automatic Fire Lever Arm Plunger Components used for rifles allowing single shot and full automatic fire A _ 232D Automatic Fire Lever Arm Stop 232E Automatic Fire Lever Stud 232F Automatic Fire Lever Locking Screw The Trigger guard is fixed to the receiver by means of three screws and stop screws The trigger guard holds the hammer and its springs ihe hammer spring guide which also acts as a cocking indicator the trigger the trigger spring and the trigger spring plunger The trigger guard also holds the auxiliary sear its spring and its spring plunger and the safety In the case of rifles designed to fire automatically the trigger guard also holds the automat
17. apacity of the magazine 10 cartridges located in the lower part of the stock the efficiency of the weapon is greatly increased Moreover it is possible to reload the magazine while partially empty Stability The weapon is so designed that the center of gravity is practically in line with the point where the stock rests against the shoulder of the shooter The upward swing of the muzzle is consequently greatly reduced and there is practically no jumping of the gun when fired This also gives in a high standard of accuracy Light weight Notwithstanding the fact that it is an automatic weapon owing to a thorough study of the functions and the resistance of the components the weight of the F N Self loading Rifle has been kept very low Weather proofness There are no openings allowing dust or mud into the mechanism Safety The weapon is absolutely safe the very principle of the relative motions of the working parts prevents the firing as long as the locking of the mechanism is not complete Further the firing pin stop prevents the forward motion of the firing pin in any position of the bolt except when it is locked Accidental firing is consequently materially impos sible Accessibllity By the fact that the complete dismounting o the working parts may be performed immediately without using any tool all the components of the mechanism are W easily accessible This makes the maintenance of the co
18. ays The first method is to cock the gun without firing with the safety on as many times as there are cartridges in the magazine When the magazine is unloaded the mechanism will be held in the rear position by bolt catch In order to close the mechanism with left hand push down magazine platform while right hand pulls operating handle slightly backwards release gently mechanism The second method is a follows release magazine by pressing with nose of cartridge on magazine catch while other hand gathers magazine and cartridges cock the gun in order to eject cartridge inserted in chamber Replace magazine All operations necessary for loading or unloading may be performed with gun on safety The safety does not prevent the motion ol mechanism either forwards or rearwards FIRING THE RIFLE fire put safety off sight the rifle and depress the trigger With a rifle fitted for the full automatic shooting to shoot Single shot fire Put fire lever in position lt S A put safety in the off position Sight the rifle and depress the trigger Each time the trigger is depressed a shot will be fired Full automatic fire With the fire lever put in position A put safety off by turning safety lever Sight the rifle and depress the trigger The firing will be automatically performed as long as the trigger is depressed and as long there are cartridges in the magazine The firing stops as soon as the trigger 1
19. bolt is closing see above 4th phase position 4 to position 5 push alternatively the left or the right side cartridge directly into the chamber As soon as the cartridge leaves the lips of the magazine it is caught by the extractor and moves with the bolt This charac teristic taken from the best repeaters presents several advantages 1 The double feeding is impossible 2 The extractor is spared because it has not to go over the rim of the cartridge as it is the case when the cartridge is first introduced into the chamber 3 The closing is smoother It ought to be mentioned that the closing is only due to the energy stored during the recoil in the springs and not to a positive mechanical action 4 HOW THE FIRING ACTION WORKS For rifles firing only single shot the firing action is fitted in the trigger guard 30 and consists The hammer 31A with its springs 34A B and its guide 31B which serves also as a cocking indicator The trigger 36 which serves as the principal sear The rear hook acting as the auxiliary sear 39 The safety 46 The firing of the cartridge occurs by means of a firing pin in two parts 24 28 housed in the bolt The characteristics of the mechanism are as follows ae Fig 9 Fig 10 Action of rifle firing only single shot fire a Separation of the shots in single shot fire The device which allows to fire exclusively shot by shot
20. disturbing neighbouring shooters Grenade launching A plug fitting the head of the gas cylinder permits to cut inlet of gas from the barrel to the gas cylinder In this case the mechanism does not work automatically and must be operated directly by hand This device is specially provided for the launching of grenades Accessories On special request the rifle is supplied with a bayonet a blank firing attachment a muzzle brake ip DESCRIPTION The main components of the F N Self loading Rifle 1 Receiver Barrel Gas cylinder Assembly 2 Bolt and Bolt Carrier Assembly 3 Receiver Cover with Rear Sight 4 Trigger Guard with Trigger Mechanism 5 Stock and Forearm 6 Magazine with Magazine Platform and Platform Spring RECEIVER BARREL GAS CYLINDER ASSEMBLY Components 1 Barrel Assembly Barrel IR Gas Cylinder Gas Cylinder Securing Pin ID Piston Guide Piston Guide Securing Pin 3 Muzzle Cap 5 Front Sight 6 Gas Adiusting Sleeve 8 Gas Cylinder Plug 12 Piston 13 Piston Return Spring 15 Receiver 15A or Receiver Body 215A 158 Locking Shoulder 216 Safety Sear 217 Safety Sear Spring 19 Cover Plate The front end of the barrel is threaded in order to take muzzle cap The barrel is breeched to the receiver and is fitted with the gas cylinder which is one piece with the front sight base the front sight protecting wings and the bayonet stud
21. e lea is easy and on the other hand that the claw of the slide lock engages well in the notches of sight leaf when slide lock is released Replace rear leaf spring in its housing Replace sight leaf on the receiver figures of leaf being turned upwards to this end depress leaf spring and slide the studs of the leaf beneath the shoulders in rear sight base Replace and screw in sight aperture screws Replace return springs to this end place inner springs and inner spring guide in outer spring replace the retum springs assembly on the rod of cover GENERAL ASSEMBLY OF RIFLE See assembly after Field Stripping page 40 Q RECOMMENDATIONS The mfle must always be on safe during transport 2 Working parts ought to be slightly oiled It is however important not to overlubricate when the rifle is used in a sandy country It is then better to keep the gun nearly dry 3 Make sure before firing that barrel is clean 4 Make sure that magazine is clean and dry 5 Make sure that magazine is fully home in trigger guard and well engaged by magazine catch 6 Do not introduce by hand a cartridge in a hot barrel 7 In case of misfire wait a few seconds before opening the mechanism 8 Adjustement of gas if necessary is periodically carried out by field armourer the soldier has not to trouble about it 9 In case of stoppage open mechanism and hold it open by means of bolt carrier catch 10 After daily fir
22. f the magazine and pushes it into the chamber The bolt is then locked downwards in the receiver by the action of the bolt carrier DETAILS OF OPERATION L THE ENGINE In addition to the barrel 1 the components of the engine are the gas cylinder 1B the piston 12 and its spring 13 the gas cylinder plug 8 and the gas adjusting sleeve 6 Single shot and full automatic fire In the F N Self Loading Rifle the utilization of gas presents several outstanding features GR 24 Fig 1 a Short gas cylinder The gas cylinder IB is a very short tubular element easily cleaned after the gas cylinder plug and the piston have been removed As experience has shown that the gas acted on the piston in the way of a hammer blow without any expanding the long cylinders which were generally used in gas operated rifles have consequently become useless b Gas escape After they have acted iri the way of a blow on the piston the gas escape outside through a slot A located on top of the front end of the gas cylinder The handicap of the gas operated weapons being the fouling the advantage of this gas escape system is the permanent sweeping outwards of the combustion residues c Gas regulation The size of the slot for the escape of gas and its location are such that when it is completely open the pressure exerted by the gas on the piston is insufficient to operate the mechanism That is t
23. has been taken over from an outstanding weapon The Browning automatic shotgun Since more than 50 years it ensures a perfect functioning to this popular gun The hammer 31A is forced backwards by the recoil of the bolt and bolt carrier and it is in any case caught by the double hook which is made up by the front end of the trigger acting as the main sear 36 and by the linked hook acting as the auxiliary sear 39 Indeed if per chance owing to the effect of the recoil the finger of the shooter has left the trigger at the moment the hammer is sent backwards the hammer is directly caught by the main sear 36 If on the contrary which is generally the case the trigger is still depressed by the finger the hammer is caught by the auxiliary sear 39 which has been put on its way by the motion of the trigger The hammer is caught in this position as long as the trigger is depressed In order to fire the next shot one has first to release the trigger The hammer is then released by the auxi liary sear 39 but is at once and unavoidably caught by the r in 36 To fire again one has to depress the trigger once more O Fig 11 Fig 12 Action of rifle firing single shot and full automatic fire For rifles able to shoct either single shot or full automatic fire the following parts are designed as to deliver this kind of firing their item number are then as follows Auxiliary sear 39 superseded by auxiliary sear 23
24. he number of cartridges in magazine may be It is possible to close the mechanism without introducing a cartridge into the chamber with the magazine loaded with 10 rounds with right hand grasp operating handle and pull it slightly back with thumb of left hand push down cartridges of magazine and release gently the mechanism retaining it with right hand The mechanism will so close above the top of the cartridges in the magazine and there will be no round in the chamber This is an original way to transport safely the loaded mmi qun make the weapon ready for firing one has just to cock the mechanism to introduce a cartridge into the chamber If the weapon is partially unloaded it is possible to complete the loading of the magazine grasp operating handle with right hand pull mechanism fully rearwards With thumb or right hand depress bolt carrier catch and release operating handle the bolt carrier will be held in the rear position by bolt carrier catch Complete the loading of magazine pull slightly back operating handle bolt carrier catch will release the bolt carrier Release operating handle mechanism will close pushing a round into the chamber The possibility to load the gun either with single rounds standard clips and the possibility to complete the loading of magazine are original features of the F N self loading rifle in comparison to similar weapons Unloading the gun may be carried out in two w
25. he point where the regulator intervenes The regulator is built from a simple threaded sleeve 6 screwed around the gas cylinder When the sleeve is screwed in the opening for gas escape decreases and consequently the thrust of the gas on the piston is growing a good functioning of the rifle without undue fatigue for the mechanism is thus ensured The gas regulation is carried out by the manufacturer when the rifle is assembled It may not be changed by the soldier The regu lator has therefore been intentionally located under the handguard On the other hand it is a very easy task for the armourer to refix the gas regulation if eventually another regulation has to be adopted either in order to use a lot of special ammunition or to use the rifle in a country in which the atmospheric conditions are completely different d Independence of the piston The piston 12 and the bolt carrier 27 are located in a straight line without any connection The return of the piston is performed instantly under the action of its own spring 13 without the interference of the return springs It is owing to this origina feature that it is possible to load the gun the same way as a repeating rifle Repeating fire Turning 180 the gas cylinder plug 8A cuts the inlet of the gas The piston does not transmit any thrust on the bolt carrier The rifle can then be used like a repeater by pulling the bolt carrier by hand 2 HOW THE OPENING
26. ic fire lever In the front of trigger guard is magazine housing In its middle part the trigger guard holds the magazine catch its spring the bolt stop and its spring and the ejector 5 STOCK HANDGUARD Plate Components 85A or Stock 285A 85B Trigger Guard Rear Screw Bushing 85E Recoil Lug 85F Recoil Lug Nut 86A Handguard 2 parts 86B Handguard Front Cap 86C Handguard Front Cap Rivet 86D Handguard Rear Cap 86E Handguard Rear Cap Rivet 87 Stock End Cap 88 Stock End Cap Screw 89 Lower Band assembly 89A Lower Band Bodv 89B Lower Band Screw 89C Lower Band Screw Retaining Collar 90 Swivel complete STA 18 Swivel Plate and Butt Plate Screw STA 19 Swivel Plate Pin Components used for rifles allowing single shot and full automatic fire 4 Plate T STA 20 Swivel Plate STA 27 Swivel STA 26 Butt Plate Standard For steel butt pla e with trap and brass butt plate with trap see Plates VIII and IX STEEL BUTT PLATE WITH TRAP STA 54 STA 55 STA 52 Plate VII Components STA 5 Butt Plate with Trap STA 52 Plate Trap STA 54 Butt Plate Trap Plunger STA 55 Butt Plate Trap Spring 4 STA 36 STA 35 STA 32 I gt STA 34 STA 33 Piate IX Components STA 32 Butt Plate STA 33 Butt Plate Trap STA 34 Butt Plate Trap Pivot STA 35 Butt Plate Trap Spring STA 3
27. ing Disengage magazine spring from magazine platform The weapon is so disassembled for complete cleaning ASSEMBLING THE BOLT Replace firing pin spring on firing pin Replace firing pin and firing pin spring in bolt Depress firing pin in bolt and replace qo 40 extractor spring head bolt extractor spring being at an angle of 90 with the bolt Release firing pin which under the tension of firing pin spring will hold extractor spring Replace extractor in its seat Rotate extractor spring 90 in order to insert it in extractor seat Replace firing pin stop ASSEMBLING THE MECHANISM Replace bolt in bolt carrier Seize bolt and bolt carrier assembly at both ends between thumb and index and replace bolt and bolt carrier assembly in receiver to enable guides of bolt to pass through clearance cut in guides of receiver When bolt and bolt carrier assembly is home push it forwards Grasp receiver cover turn upwards cover locking key insert recoil springs in hole of bolt carrier Compress recoil springs pushing cover forward Replace cover downwards in receiver front end first and release cover as to allow it to drop backwards fully home in its guides Turn cover locking key downwards Test motions of mechanism a few times by hand in order to make sure assembly is correct ASSEMBLING THE PISTON Replace piston spring on piston replace piston and piston spring in gas cylinder head of piston turned to the muzzle
28. ing remove gas cylinder and clean it as well as piston Make sure that piston is wel free in gas cylinder ll In order to be ready for immediate firing the rifle may he transported with magazine loaded with 10 rounds but with the bolt closed on empty chamber To open fire it is just necessary to cock the mechanism 12 When the weapon is not firing protective cover on right side of receiver ought to be pushed forward in order to avoid sand and dust to get into the mechanism NUMERICAL Weight ol rifle Weiqht of single barrel Weight of barrel ass mbly Lenght of rifle Lenght of barrel DEE Weight of bayonet 230 mm long Weight of bayongt with scabbard Weight of bayonet 385 mm long Weight of long bayonet with scabbard 4 300 kg 0 920 kg 1 120 1 110 m 590 mm 0 320 kg 0 550 kg 0 450 kg 0 700 kg PARTS N Components used for rifles allowing automatic firing Number c 1 1 IC 1D 195A 215A 15B 216A 2168 216C 217 19 19A 19B 21 22 23 24 25 26 27 227 28 30 230 31 31A 231A 31B 31C NAME Barrel Barrel Gas Cylinder Gas Cylinder Securing Pin Piston Guide Piston Guide Securing Pin Muzzle Front Sight Gas adjusting Sleeve Gas Cylinder Plug complete Gas Cylinder Plug I Gas Cylinder Plug Plunger Gas Cylinder Plug Plunger Spring Gas Cylinder Plug d
29. le variations of ammunitions The bolt of the F N Self loading Rifle is in one piece it is locked downwards at the rear o the magazine Gas operation The F N Rifle is a gas operated weapon The gas port is located sufficiently near the muzzle as to allow the pressure in the chamber to drop before the mechanism is unlocked the gas intake system permits to take into the mechanism exactly sufficient gas to operate the weapon This gas regulation enables to suit to atmospheric conditions as well as to variations in ammunition As a consequence of the fact that only the required quantity of gas is allowed to pass into the gas cylinder the fouling of the parts submitted to the action of gas is reduced to a minimum On the other hand the escape of the excess QE of gas outside of the weapon sweeps continuously into the air the residues of powder combustion this also reduces the possibility of fouling Closed bolt In opposition to the automatic machine rifles which generally fire from an open bolt the self loading rifles fire with closed bolt i e that the bolt is in its forward position and locked when the trigger is depressed Consequently the bolt of the F N Self loading Rifle is held at the rear after each shot The bolt after performing automatically all its functions returns to the forward posi tion This feature enables to obtain a high standard of accuracy Capacity Owing to the c
30. lide Sight Slide Lock Rear Sight Slide Lock Stock Stock Body Trigger Guard Rear Screw Bushing Recoil Lug T ME ae Recoil Lug Nut Handguard complete Handguard Body 2 pieces Handguard Front Cap Handguard Front Cap Rivet Handguard Rear Cap Q Number of part NAME Quant per 86E Handguard Rear Cap Rivet 87 Front End Cap assembly 87 Front End Cap Body 87B Front End Cap Bushing 88 Front End Cap Screw 89 Lower Band assembly 89A Lower Band Body 89B Lower Band Screw 89C Lower Band Screw Retaining Screw 90 Swivel complete 90A Swivel Support STA 27 Swivel 90C Swivel Pin STA 18 Swivel Base and Butt Plate Screw STA 19 Swivel Base Pin E STA 20 Swivel Base STA 26 Butt Plate Standard Type 93 Sling complete 93A Sling Leather 938 Sling Buckle STA 40 Sling Button 501 Gas Regulator Key BAYONET 61 Blade l 62 Handle 1 63 Cross Guard 1 64 Plunger Catch 65 Stock 2 66 Scabbard 66a Scabbard Spring 1 66b Scabbard Spring Screw 1 66c Scabbard Hook 66d Scabbard Collar 1 66e Scabbard Button l 67 Plunger Catch Nut 68 Stock Screw 2 69a Washer 2 70 Handle Pin 2 71 Cross Guard Pin 2 72 Plunger Catch Spring Quant per Gun BRASS BUTT PLATE WITH TRAP STA 32 Butt Plate STA 33 Butt Plate Trap GTA 24 Butt Plate Trap Piv
31. mponents very easy and permits to clear immediately an accidental stoppage Simplicity The weapon is very simple It consists only in a few groups of components The instruction of the soldier is consequently very easy Bolt and Bolt carrier catches The bolt catch holds the bolt open when the magazine is empty When the rifle has been completely or partially reloaded pulling slightly back the cocking handle and releasing it will release the mecha nism forward pushing a cartridge ahead of it into the chamber A hand operated bolt carrier catch permits to hold the mechanism in the open position with a loaded magazine Loading the gun In opposition to other weapons of similar type the F N Self loading rifle does not require a special clip to load the magazine The loading can be performed by single cartridges or by means of ordinary clips holding 5 rounds Owing to the hand operated bolt carrier catch it is possible to reload a magazine partially unloaded Safety and cocking indicator In addition to a high efficient safety which locks the trigger mechanism and is easy to control in the dark the rifle is provided with a cocking indicator which extending below the trigger guard when the hammer is cocked is easily When the cocking indicator protrudes the shooter is aware that he has to set the gun at safe if he does not intend to use it immediately Ejection Occurs to the right and forward to prevent
32. on between lt Safe lt Off Depress safety spring plunger press safety fully home To assemble the action replace trigger spring and plunger in their housing replace the trigger in the trigger guard from the top taking care that the stud fitted on the safety lever is engaged in the groove cut in the trigger replace auxiliary sear spring and plunger in their housing in the auxiliary sear replace auxiliary sear assembly into the trigger guard the hooks of trigger and of auxiliary sear facing each other and axis holes b2ing in line replace trigger axis pin In the rifles fitted for the full automatic fire replace the automatic fire lever in the trigger guard swing it in position S A To replace the ejector and the magazine catch replace in its housing the magazine catch spring replace in trigger guard magazine catch and ejector putting their pin holes in line Replace magazine catch axis pin from right to left To replace the bolt stop replace bolt stop in its housing in the trigger guard replace bolt stop retainer plunger and spring replace bolt stop retainer as to engage head of bolt stop re ainer plunger into its housing cut in the bolt stop retainer ASSEMBLING RECEIVER BARREL GROUP For the rifles which are fitted for the full automatic fire replace the safety sear spring with the small coil downwards on the eafety sear Replace safety sear group in the receiver reversing operation of stripping
33. open device 6 SAFEGUARDS The functioning of the hand safety which locks the trigger has been described before Further as detailed below the rifle may be carried with 10 cartridges in the magazine without cartridge in the chamber In order to be ready for firing only pull operating handle fully rearwards and release it SS BN ie 14 There are two internal safeguards which make the firing impossible so long as the rifle is not duly locked le The first of these safeguards is performed without the addi tion of any part it results only from the relative motions of the bolt OK and of the bolt carrier In fact the hammer can only reach the firing pin when the bolt is locked and positively confirmed in this position by the complementary motion of the bolt carrier 2 The second safeguard is performed by means of a firing pin stop 26 which prevents the striker to protude in the face of the bolt so long as the locking of the rifle is not performed as the bolt carrier prevents any motion of the firing pin stop upwards see fig 15 On the contrary when the rifle is locked the firing pin stop is allowed to raise and does no more prevent the motions of the firing pin see fig 16 Fig 15 CHM ee ES me ET x gt SS Ze S HOW TO HANDLE THE RIFLE TO MAKE THE GUN SAFE With thumb of right hand rotate safety lever downwards In this position of safety le
34. ot STA 35 Butt Plate Trap Spring STA 36 Butt Plate Trap Spring Screw funes Dag Meu pe STEEL BUTT PLATE WITH TRAP STA 51 Butt Plate STA 52 Butt Plate ST A 53 Butt Plate Trap Pivot 5 54 Plate Trap Plunger STA 55 Butt Plate Trap Spring ACGESSORIES TO BE SUPPLIED ON SPECIAL REQUEST 2 Muzzle Brake 503 Blank Firing Attachment 506 Barrel Cleaner 507 Clecner 5 44 Barrel Clecning Brush STA 45 Chamber Clecming Brush wrt IB f L AL VH Pee XXX XE Um DINN SS E EE
35. r Safety Spring Safety Lever Plug Safety Lever Plug Pin Safety Stud Ejector Magazine Catch Magazine Catch Spring Magazine Catch Axis Pin Trigger Guard Front Screw Trigger Guard Center Screw Trigger Guard Rear Screw Trigger Guard Stop Screw Magazine complete Magazine Case Magazine Case Rear Wall Qf EM UO EL IH pep CE DEMEURE TRE p s j p pt oe w 49 Number of part 60C 60D 60E 60F 60G 60H 61 62 65 66 66A 66B 66D 66E 66F 66G 67 67A 67C 67D 70 70A 70B 70C 71 72 73 74 75 76 77 78 79 65 85 285 85B 85E 85F 86 86A 86B 86C 86D NAME Magazine Case Lug Cartridge Front Guide Magazine Catch Hook Magazine Rivet long Magazine Rivet short e us Magazine Catch Rivet Magazine Platform Magazine Platform Spring Receiver Cover Quant per Gun Return Spring Guide and Cover Locking Key complete Retuin Spring Guide Cover Locking Key e Cover Locking Key Plunger Cover Locking Key Plunger Washer Cover Locking Key Cap ae Cover Locking Key Cap Washer Return Springs complete with Guide Inner Return Spring e hota d Inner Return Springs Guide Outer Return Spring Bolt Carrier Catch complete Bolt Carrier Catch Body Bolt Carrier Catch Head Bolt Carrier Catch Washer Bolt Carrier Catch Stop Bolt Carrier Catch pig Rear Sight Leaf Rear Sight Aperture Rear Sight Aperture Adiusting Screw Rear Sight Leaf Spring Sight S
36. ravelled to the rear the magazine platform rear end engages the front end of the bolt stop lifting the stop in front of the bolt and preventing it to return in the closing position The shooter is consequently warned that the magazine of his rifle is empty As the piston has returned to its forward position and as the bolt is held to the rear the magazine is open to be refilled It is only necessary to insert two clips with 5 rounds each one after each other in the grooves out in the receiver and to press with the thumb of the right hand on the upper cartridge of each clip in order to introduce the 2 bundles of 5 cartridges into the magazine After the cartridges have been introduced into the magazine W 35 closing the rifle only requires a short pull on the operating handle so introducing a cartridge into the chamber Pulling of the operating handle compels indeed the bolt to withdraw releasing the holding open device which withdraws in its housing under the action of its spring Partial refilling of the magazine If it is desired to refill the magazine before it is empty in order to give the rifle its full potentiality of fire the bolt carrier stop is to be used This stop is fitted on the left side of the cover and is perfectly accessible to the thumb of the right hand after pulling operating handle and consequently the bolt to the rear The retracting of this stop is the same as that of the automatic holding
37. rd 2 Muzzle Brake 503 Blank Firing Attachment 506 Barrel Cleaner STA 44 Barrel Cleaning Brush STA 45 Chamber Cleaning Brush 507 Cleaner 93 Sling N B The key 501 is supplied with each rifle it is used for adjustement of the gas HOW THE N SELF LOADING RIFLE WORKS The gun being for firing the action on the trigger releases the hammer Under the tension of its springs the hammer strikes the firing pin which in turn strikes the primer of the cartridge and ignites the powder charge Ist phase The bolt opens under the action of the gas A small amount of gas escapes through a port bored in the barrel and passes in the gas cylinder where it kicks the piston back The piston drives the bolt carrier back The bolt carrier unlocks the bolt and pulls it upwards to the rear The extractor which fits to the bolt draws the empty shell out of the chamber When the empty case is completely disengaged from the chamber its bottom strikes the ejector which ejects it to the right out of the gun In its backward motion the bolt carrier cocks the hammer and compresses the recoil springs 2d phase The bolt is closed under the tension of recoil springs As for any weapon firing with closed bolt as soon as the bolt carrier has completed its backward motion the recoil springs drive it forward The bolt carrier itself forces the bolt forward The bolt drives a cartridge ahead out o
38. s released Q amp SIRIPPING AND ASSEMBLING L FIELD STRIPPING AND ASSEMBLING STRIPPING THE MECHANISM Turn receiver cover locking key 180 upwards grasp receiver cover and slide it forward against action of recoil springs raise slightly rear end of receiver cover in order to disengage cover from guides in receiver Release cover rearward Cover and recoil springs will so be removed from receiver Grasp operating handle and pull back bolt carrier and bolt assembly until guides of bolt carrier are in line with clearance cut in guides of receiver Lift frontend of bolt carrier and bolt assembly and remove bolt carrier and bolt assembly from receiver Remove bolt from bolt carrier STRIPPING THE BOLT First remove firing pin stop Using nose of cartridge lift extractor spring out of spring housing cut in bolt and rotate extractor spring 90 Remove extractor Grasp bolt at both ends between thumb and index finger Push firing pin in bolt Remove extractor spring firing pin and firing pin spring Take firing pin spring off firing pin REMOVING THE PISTON Using nose of cartridge depress gas cylinder plug catch and rotate plug 90 Remove gas cylinder plug Tilt rifle forward piston and piston spring will slide out of gas cylinder Remove piston spring from piston STRIPPING THE MAGAZINE Using nose ol cartridge lift magazine catch and remove magazine from trigger guard Remove magazine platform and platform spr
39. ton rod is fitted at its fore end whith a lug which carries the bolt rearward as soon as the slopes have performed the unlocking Externally the bolt carrier is fitted with two guiding ribs and with the operating handle In the top of the bolt carrier is the retum springs housing 3 RECEIVER COVER AND SIGHT COMPONENTS Plate V Components 65 Receiver Cover 66 Return Springs Guide md Cover Locking Key 67A Inner Return Spring 67C Inner Return Spring Guide 67D Outer Return Spring 70 Carrier Catch 71 Bolt Carrier Catch Stop 72 Bolt Carrier Catch Spring 73 Sight Leaf 74 Rear Sight Aperture 75 Rear Sight Aperture Adjusting Screw 76 Rear Sight Leaf Spring 77 Rear Sight Slide 78 Rear Sight Slide Lock 79 Rear Sight Slide Lock Spring Plate The Receiver cover houses the return springs and their guide the receiver cover locking key and the bolt carrier catch On the top of the cover is the rear sight base which supports the sight leaf with the rear sight slide and the rear sight aperture The fore end of the receiver cover is recessed to take the clip when the cartridges are introduced in the magazine H 4 TRIGGER GUARD AND TRIGGER MECHANISM 31A or 231A Waan 4 4 b 31B 43 34B 34 40 44 45 30 or 230 Plate VI d 232A 2328 232C Components Trigger Guard Hammer complete
40. ver trigger is positively locked Moreover safety lever prevents the finger of the shooter to reach the trigger It is so very easy even in the dark to make sure that the gun is safe To release safety reverse the movement safety lever upwards with index finger of right hand TO OPEN AND TO CLOSE THE BOLT To open the bolt grasp with right hand operating handle and draw it fully back If there are no cartridges in magazine bolt will be held in the open position by bolt catch which under the action of magazine platform protrudes before the bolt To close the bolt push down magazine platform with thumb of left hand at the same time draw bolt carrier slightly back with right hand Under the tension of its spring bolt catch is forced down and does no more protrude in the path of bolt Release gently mechanism forward withdraw left thumb when bolt is above magazine platform LOADING THE RIFLE With right hand grasp operating handle and pull mechanism to the rear The mechanism will be held open by the bolt catch Loading the gun may be carried out either by inserting single cartridges into magazine or by means of 5 rounds clips When the loading is completed draw slightly back slide handle and let it go mechanism will close forward under the thension of recoil springs pushing a cartridge into the chamber The magazine holds 10 cartridges but it is not necessary to fill it the mechanism will close in the same way whatever t
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