FnFal x8e1 x8e2 Manual

7/27/2019 FnFal x8e1 x8e2 Manual

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"RESTRICTED

I he lnform.nlon &lven In this document11 not to be c o m m u n l c u ~ d . eitherdh eu y or Indirectly ;"(o the Press or to

NOTES ~on' '

, . . . . , - ~ - l . - ! f ~ ~ . . _ ' ' ' P ~ . ( ' . ) + o fl l 1\

XSE I (known as FN TYPJ; A)X8E2 (known as FN TYPE B)


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RESThe Info rmationis not to bedirectly or indireany person not a

N

RIFLE,X8E I (knoX8E2 (kno

TROO

LAND


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Page 4-7-

NOrES ON RIFLE, 7.62 mm.X8E1 (ltncmt as FN TYPE A).I8E2 ( lcn01m as FN TYPE B)fo r TROOP TRIALSLAND SERVICE 1954AMENDMENrS NO.1

~ 11Para.30" and subs t i t u t e -"30 ABOORMAL WEATHER CONmTIONS

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When preparhlg th e r i f l e fo r us e in abnormal weather oondi ionaa l l workings par ts wil l be thoroughly dried before being lubr icatedwith special o i l .The gas regula tor may have to be adjusted to give more gas.I t wil l ass i s t in th e in i t i a l stages o:f f i r ing i: f th e worldngpar ts ar e hand operated sharp]3 backwards an d :forwards a : f s tilllesbefore loading takes plaoe.Lubricants wil l be used as :foll(li'{s:

Lubricants to be used :for temperatureOver Between BetweenUSE 1P'F a: 80o:F & Bel(li'{

Oil,OX 52 Oil,OX 52 Oil,OX 13 50/50 mixtureAll working or or or Oil,OX 13 an dpar ts in un ,ox 13 on,ox 13 Grease Kerosine,vaporizingbod;y" an d lG380 or 50/50 mixture oft r igger Grease lG 380 an dgroup. Kerosine,vaporizing.Emergency substi tute

Oil,OM 52 Oil,OM 52 - Kerosine, burningNO!Es:- (a ) Magazines wil l also be cleaned an d lubr icated.\ (b ) In hot, dust y climates th e r i f l e wil l be very l ight lyoiled."

HF/8 .Amdt.1 INSPECTORATE OF ARMAMEN.rSV.OOLWICH

-~RE

The informatiois not to bedirectly or Indiany person not

NORIFLE

X8E1, X

TROLAN

AMEN

MANUCover and Title page delete "PAGE 46 Para. 25 - l ine 10D ele te "OC 600" and substit

CUT-OPAGE 48Delete table of lubricants,

HB.8/1


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Amdt.4;6c-t;l1960Lubricants to be used for various temperatures:-Use Temperature LubricantNormal Es

~ 1 working Below 0F 50/50 Mixture of V~ a r t s in body and Oil, OX13 and it r igger mechanism Kerosene B K

0F to 40F Oil, OX 13 O40F to 80F Oil, OX 52 OOver 80F OOil, OX 52 O

Lubricants to be used for special purposes:-Purpose Lubric

Storage Preservative, PX 1Beach landings Grease , LG 380 orDusty/sandy climates

NOTES:

Graphited grease X

(a) Magazines wil l also be cleaned and lubric(b) In hot 11 dusty climates the ri f le wil l beoiled.


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RESTRICTEDTh8 I nformation alve n In this documentis not to be communlut ed. eitherdirectly or Ind irectly, to the Preu or t oany person authorl ted to receive it.

NOTES ONRIFLE , 7. 62 nm.XBE1 (known as FN TYPE A)XBE2 (known as FN TYPE B)

f orTROOP TRIALS

LAND SERVICE1954-

AMEIDMENTS (NO. 2)Page 6 para. 5 ~ f r a n Both in l ine 7 to slide"

in l ine 8 an d Subst i tu te : -The handle ha s a rectangular stud whioh protrudesinto th e body to connect with th e guide ri b on th es l ide fo r cooking th e r i f le . The auxiliary catchha s a stud also , but th is only protrudes when th ecatch i s pushed forward. It then connects withth e rear of the s lot in th e body when th e cockinghandle i s withdrawn.

Red Barracks Inspectorate of A ~ e nWo olwich22Di September, 1954HB/8 Amdt.2

CONTEN.r..

Introduct ion ...Teahnica1 deta i l sSpecial featuresBarrel groupBody groupTrigger groupButt group

. . ...... ...-i

SECTI. .. SECTI

Grenade projec tor Differences between types of r i f lSECTIO

Field stripping .Assembly ...Additional stripping ...Body group ...Barrel group . ...Magazine ... . .Unit sight ...Loading and unloading ...SECTIBackward an d Forward action Trigger mechanismHolding open Device

Causes of stoppagesRemedy immediate actionRemedy stoppages

Cleaning materialsBefore f i r ingGaa regulator During f ir ing After f i r ing Abnormal weather conditions

SECT

SECTI.......

SECTIO'B' type r i f leBat t le sightZero data

HB.B


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Rifle, 7. 62-mm.SECTION I - GENERAL

1. INTROOOCTION . ~ : r u . s r i f l eprov ides the user with an easi ly handle

capable of producing e i ther the del iberate accurate ra teof the hand operated r i f l e , the rapid s ingle shot ra tese l f loading r i f l e , or a volume of automatic f i re , i f fa specia l change l ever .

It can be f i t t ed with a bayonet for close quar ter for a launcher fo r grenade f i r ing .

The r i f l e has no cooling system other than the ef fprevail ing temperature conditions, and there i s a clearabetween handguard and barre l which allows fre e circulat iWith a se l f loading r i f l e there wi l l be a tendencyrapid f i re u n n e o e s s a r i ~ a t targets a t long ranges, th iswastes ammunition, but overheats the weapon.

The abi l i ty to exploit the many uses of th i s r i f leas always, depend on the efficiency of the f i re r . Prevhave sh01m tha t the t rained man can reach a standard ofof H.bout 20 or more accurate s ingle shots per minute, fseparate ta rge ts , and a high ra te of automatic f i re whe

Two types of r i f les are undergoing te s ts a,nd thesereferred to as Type A or Type B. This book i s wri t tenthe Type A weapon.2. TECHNICAL DETAILS

CalibreLength of r i f l eLength of barre l

7.62-mm.41.5 inch21 inches


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TECHNICAL DETAILS - contd.Cyolic rate of f i reJ.fuzzle Velocity~ t e m of operationType of sightSight radius iron s ightJ4agazineldagazine Ca:paaltyldagazine Weight emptyMagazine Weight f u l l

65o-700 R.P.M.2, BOO f t . sec.GasUnit or Iron21.77 inchesBox type20 rolmds8.25-oz.1.58-lb.

3. SPECIAL FEATURES(a ) :Meohani.cal SafetyA safety sear , operated by th e s l ide , ensures tha t th ehammer oannot be released to s tr ike th e firing pin un t i lth e breech block i s ful ly fo:mard.The rear end of the f'iring pin protrudes beyond th e rearface of th e s l ide only 'VIhen th e breech blocic i s in th elocked posit ion, therefore th e f'iring pin cannot be struckby th e hammer unti l th e breech is sealed.(b ) Applied Safety

Applied safety is provided ey th e change l ever. When th elever i s pu t to th e S (safe) posit ion, the rolmded edge ofth e change lever spindle i s over the t r igger platform,preventing it fran r is ing to engage th e t a i l of th e sear.(c) Gas RegulatorThe quanti ty of gas allowed to escape is controlled by th ega s regulator, th e balance being used to drive the pi ston

(d )

HB.8

to th e rear . The adjustment of th e gas regulator i s simple,an d can be done by using a rolmd -o f aumlmi ion.

I t is

\h

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draw th e breech block reaf i l l ed magazine i s on th epulled fa r enough back tomagazine, an d thus a dou(e ) ~ e Levere dlaiige l ever can be sShot, and Safe. A changese t in three posit ions.( f') Holding Open DeviceThiS device i s operated bplatform, th e breech blocmagazine is empty.(g ) s t r i p fmThe r1e opens similar tstripped without th e aid(h) LoadingType A" r i f le oan be loa

:t:.Olmds; loading i s similloading device can be use( j) Ba,yonet

HB.B

The o rosspieoe of th e ba;which ac t as a flash elim


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SECTION I I - DESCRIPUON4-. BARREL GROUP ( f igs. 1 2 an d 3)A lu g on the underside of th e barrel forms a f i t t in g fo r b o t ~th e beyonet and th e grenade launcher. The fron t sling swivel,secured to a band by a screw. i s assembled between two co l lars onth e barre l .The ga s block (fig.2) i s f i t t ed al ong a keyway on th e barrelan d seaured by a pin. A ga s plug closes the front en d of th e ga sblock, where it is retained by two lugs engaging a groove in th eblock. A spring plunger on th e head of the gas plug f i ts intoshallow recesses a t th e end of th e block,prevent ing th e plug fromturning.

SECU RIN G WA SHE R _ ; .:AJ.

GAS REG ULATO R SPRI NG

RETAIN ING PLUNGE R& SPR IN G

Gas Block & Gas

\

-s

I f th e l e t te r A on th e plugthat th e r i f le i s se t fo r ball amth e ga s port in th e plug i s directh e barrel .Fo r r i f l e grenade f i r ing , whpropel th e grenade, th e l e t te r Ashutting off th e ga s from the cylThe forward end of th e gas cinto th e gas block, which i s threaga s regulator .The ga s regulator has a numbsurface, fo r us e when adjusting thengagement of th e ga s regulator spspring ar e bent over an d f i t intoga s block.A ga s escape hole is dr i l ledseated immediately rear of th eelongated and can be opened or cloga s escape holes ar e dr i l led in tocyl inder at a distance of 2.4--insThe foresight is cone shapedcol la r i s formed immediately belowindents around i t s edge. Before aspring stee l washer on which ar eengage in th e indents on th e co l lgas block, and it i s protected frodesigned as one piece with th e ga

HB.B

------ -- GAS

Fig. 3- - --


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A bush i s f i t t ed over th e rear en d of the ga s cyl inder .Grooves on th e outer surface of th e bush allow th e us e of at ightening too l .The ga s cyl inder houses th e piston and spring.The barrel i s threaded at th e rear ( f ig . 3) an d i s breeohedinto th e body; a hand guard sodcet on th e outer surface, holds th etwo handguards a t the rear , the other ends being secured by a screwpassing through th e ga s block.Metal l:inings ar e assembled to th e front ends of th e handguards to form a finn leverage when adjust ing th e gas regulator.5o BODY GROUP ( f igs , 1 , 4, 5 and 6)A carrying handle i s f i t ted to th e upper :f'ront part of th e ~ .an d when no t in us e it is folded down to the right side of th e r if ' le.A projection on th e rear to p surface of th e body fonns a seat ingfo r th e f'ront end of th e horse shoe cl ip.The cocld.ng handle ( fig.4-) i s on th e l e f t of th e body an d hasa s p r i n g ~ l o a d e d auxiliary cocking catch assembled on i t s extension.Both th e handle an d th e catch have a rectangular stud which connectswith th e breech block s l ide.The body cover is posi t ioned by r ibs f i t t ing into guidegrooves in th e body, it i s prevented by being pushed to o fa rforward by stops on each side of th e rear end. The front to p

Il L DETENT AN D SPRING- - - - - - - - ~ - - ~ - - - -Fig. 4 AUXILIAR Y CATCHCocking Handle _ _ _ ~ IJ ' J

-

SLIDE~EXT.RACTORNG PIN & S

Fig . 5 Breech B

surface i s f i t t ed with guides toshoe olip .The breech block s l ide ( f ig.5block. I t i s f i t ted by ribs into

i t s rear end a spring loaded ro dIn th e rear inner surface ofwhich actuate the shoulders of thThe breech block ( f ig.5) ha sto house th e f i r ing pin and springengaging across an elongated reoecompression thus keeping th e fronth e face of th e breech block.An extractor and spring is f ibreech blodc, with the claw of th eface of the block.

HB.8


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The \mder surface of th e breech block has an allowance fo rth e ejector , an d th e rear bottom f'aoe forms a locking shoulder.The ejector i s an in tegra l par t of th e boey (f ' ig.6) an d ispositioned in front of th e locking shoulder recess. The upperann of the safety sear on th e lei 't of th e ejector , protrudes upinto th e boczy-.

At th e rear of th e magazine housing i s th e holding open device;th is is spring-loaded an d has a thumb oatah a t it lower end. Amagazine oatah, th e upper ann of which protrudes into th e magazinehousing, projects to the rear . I t i s milled on i t s rear surface toass is t in manipulation. A magazin e catch spring i s f i t ted betweencatch and body, th e magazine catch an d th e holding open device ar eheld in posit ion by a screw passing throl.lgh th e body.The safety sear an d spring, housed in th e lei ' t of th e b ~ 1ar e retained by th e but t frame jo in t pin.

HOLDING OPEN DEVICESAFETY SEAR

LOCK

MAGAZINE CATCH

BB.8

I .II

-

BUTT FRAME JOINT PIN

CHANGE LEVER

Fig. 7 Rifle opened

6. TRIGGER GROUP (f igs . 1, 7 an"The f orward end of the t r iggto th e :bod;y group, where it i s seand retaining pin.The hammer and t r igger ( f ig .passing through th e t r igger housimoving by a locking pla te securedl ever . The hammer spring ro d i sth e hammer spring par t ial ly coveren d of the housing i s coned and fcross frame of th e t r igg er housinOn th e shank of th e ha.mmer aus e with th e t r igger sear , th e upThe t r igger an d sear ar e helspring being f i t t ed between seari s elongated to allow backward anpi vot arm of th e t r igger i s heldThe dnange l ever spindle is positof th e t r igger .I HB.8


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On th e le:f't of the t r igger housing ar e three indents marlcedA, S an d R; these are seat ings fo r th e spring plunger of th e dl.angel ever .The t r igger guard i s bent aver a t th e f ront end, and hooked

into th e forward en d of th e t r igger housing. The rear en d i ssprung aver the t r igger plunger housing and held by th e uppersurface of th e p i s to l gr ip .The p i s to l gr ip i s secured to th e t r igger housing by a locknut . The body locking catch assembly i s si tua ted a t th e rear ofth e t r igger housing.

BB.8

-11

7. BUTT GROUP ( f ~ s . 1 an d 8)Th e backsight t fig.8) i s of t

be moved up or down an incl ined rath e l e f t side has a project ion whramp. Range figures ar e engravedbeing 200 yards, th e highest 600 yinto i t s seating and there is an ath e sight block.A re tum spring tube ( f ig .1)surface of the but t frame, an d cowhich i s held under compression btube.

Th e but t i s secured by tw o scbut t , the other screwed into th e bThe but t i s dr i l led fo r an.of i t t ed on th e but t pla te .A s l ing swivel i s f i t t ed on8. BAYONET ( f ig .9)The bayonet i s of th e broad two project ions on the cross piec

Th e handle i s f i t t ed with ato th e barre l .The handle i s also spring-loa'ba\Yonet fixed,dif ' ferences in th e

SPRING CAT

Fig. 9

BB.8


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9. GRENADE PROJEmOR (f ig .10)This consists of a s t ee l tube which f i t s over th e muzzle ofth e r i f le an d is secured on the bayonet lu g by a spring catch.A specia l sight , hinged a t th e rear of the projector is marked.in graduations fo r ranges 25, 501 75 an d 100 yards.A case i s provided fo r th e projector .Grenade cartridgeThis i s similar in appearance to th e blank r i f le cartridge,being crimped at the neck, but it wil l be blackened for half i t slength to dis t inguish it f'rom blank.No other ty;pe of cartridge wil l be used to f i re th e grenade.Preparation for f i ~The gas plug W i be turned so tha t th e l e t te r "A" i s upsidedown.NOTEs Fo r further detailS of grenade firing se e User Handbook(Provisional) for th e Grenade r i f le .A/Tk. No.94 (Energa)with Projector No.4 Rifle Mk.5, Land Service, 1952.

SIGHT FOLDED SPRING CATCH

Fig. 10 Grenade Projector

HB.B

I

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-1

10. DIFFERENCES BETWEEN TYPES OFThe "B" type r i f l e diffe rs f(a ) ~ (fig.11)This r i f le i s f i t ted with

small telescope-shaped tubpointer an d two range l ineth e s ight . The pointer i s used a t ranat 400 an d 600 yards resp

BODY COVER

Fig. II Unit Sight " B" Typ e R

HB.B


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The sight i s protected by a cover guard which oan beremoved to th e rear . The sight is secured t o a braolcet by two c o l l a r s ~ securedunderneath by sorews. The braolcet i s secured t o th e bodyoover by a loolc screw a t each end, th e f ront one on top therear one underneath. At th e fozward end i s a nut, hexagonalin shape, and th is nu t i s eccentric so tha t , when turned itmOY'es th e bracket la teral ly .A second hexagonal shaped nu t is a t th e rear; it has anumber of' small narks around i ts edge. This nu t has no:nnalthreads an d when turned it raises or lowers th e rear of' th ebracket. These nuts should be turned only when th e lockscrews have been loosened.Battle sights fo r us e at 200 yards are f i t t ed . The backsightto th e rear nu t of' th e unit sight, an d a fixed foresightto th e ga s block) th e foresight i s protected on i t s l e f t sideonly. These sights ar e offset to th e l e f t .

(b ) Loading

HB.B

I t i s no t possible to c l ip load this r if le . The boqy coversl ide i s strengthened and f i ts :f'ully forward up to th ebreech face, it ha s an ejector opening and deflector pla teon i t s r ight forward end.

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SECTION I I I

11 . FIELD STRIPPI:rG (f'iga, 12, 13Fo r f ield s t r ipping no tools IB8\V' be necessary to us e th e nose oespecial.l;r after prolonged f i r ing .saf'e before stripping c001111enoes, iposit ion u n t i l th e r i f le i s assemb

Press th e magazine catch 1 a:fo:nrard to remove i t .

Fig. 12 RemovHB .B


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Cook th e h8lllller by pulling back th e oocld.ng handl.e 8 8 far8 8 it wi l l go , - look in to th e breech an d body to ensure tha tth e r i f l e i s clear , all01r th e breech block to go fonva.rdWlder the action of th e return spr ing. Set the safe tylever to safe .W1 th th e muzzle held pointing s l ight ly dolmn.rds, holdth e barrel group firmly,press th e body looking lever 3 toth e rear an d open th e r i f l e . Pull th e body cover, 4 breechblock 5 and sl ide 6 to th e rear .

Fig. 13 Slide & Breech Block GroupHB.B

. -.,

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6

,..

5Hold th e s l ide 6 il:werted iro d 7 rearwards, pull th e blos l ide 6. Put th e foref'illgersof the bnech block 5, an d thfiring pin 8, press togetherbreech block 5 outwards Wltll

slide ' Fig. 14 To Separate

HiL 8


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10

Press in th e detent 9 of th e gas plug 10 using th e nose ofa bullet . turn a quarter turn r ight or le:f't to remove th e .plug 10 . The piston 11 and spring 12 oan then be withdrmm.

Fig. 15 Piston & Spring12 . ASSEMBLY

Pu t the piston and spring into the cylinder, and assemble th ega s plug w:l. th th e l e t te r A in th e required posit ion. Ensure -thatth e detent on th e plug is correctly engaged in th e shallow recessof th e gas block.The breech block and s l ide ar e assembled in the reverse order.Before sliding into th e body. push th e breech block :f'ully f'o:rwardalong th e sl ide so that th e locking shoulder i s clear of th e loweraur.faoe.Slide th e bod;y cover into position and, th e muzzlepointing s l ightly downwards bring up th e butt sh.a.rPly to close ther i f le .

HB.8 Finally t e s t th e r i f l e by cocking and operating th e t r igger .

..-1

13 . ADDITIONAL STRIPPIID (f igs .~ Additional stripping (magby a qualified anJIO\lrer.The r i f le wi l l f i r s t be f ie ld

14

Press the f ir ing pin 8 foiWpush ou t th e retaining pin 14spring 13 ou t to th e rear and

Fig. 16

IS 16~Pu t th e nose of a bullet unand push outwards as fa r as p

15 olear of th e blook: 5. Pusextraotor spring 16 to diseng

Fig. 17BB.8


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17

Unscrew th e butt .frame jo in t pinretainer 17 and push ou t th e butt framejo in t pin 18, then draw th e butt groupmray f'rau. th e body group.

!HJ3.B

Fig . 18 Stripping the Butt Group

21

Se t th e chenge lever 19 to R and plaoe th e fingers orthumb over th e hammer 20 to oontrol i ts forward IDOV"ementpress th e t r igger 21 and ease th e hammer 20 .fonm.rd. Turnth e obange le t ' er 19 so tha t the lever is upright, then pull.out.fig. 19 To Remove Safety Lever

~

20

HB. 8

-2

The halllmer muat never be ar i f le ia open - no r when tFailure to obseiVe th is prth e hammer spring rod.

----r23

Fig . 20 H

~ 2 5

Fig. 21


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The sear spriDg 26an d plunger 27 ar emounted in th e oentreof the t r igger 21 th esear 28 i s on th esame axis pin 29 as th et r igger 21 .Hold against th e sear

'Ji 28 with the finger tooontrol th e spring 26an d puah ou t th e t r iggeraxis pin 29. Removeth e sear 28 and t r igger21 in an 'UJ.'Ward direct-io n ou t of th e t r iggerhousing 30. Remove th esear spring 26 an dplunger 27 from th et r igger 21.

Fig. 22 Trigger SearUnsarew th e pis tol grip nu tsarew 31 an d remove th epi s to l grip 32 from th e stem33. Remove th e t r iggerguard t r igger spring 34-and plunger 35 :f'rom theirhousing 36,

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Fig. 23 Pistol Grip

i

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-----43

Unscrew 'the butt pla te screw38. Usillg th e special t ool prospring screw 4D and wi hdrmr th4-?.Care must be ea:ercised whenthreads an d th e spriDg 4-1 shouor distort ion of th e spr!Dg isTo remove th e but t 4-3 unscrewpositioned a t th e rear en d ofrs.ove th e butt 4-3 from th e retFig. 24 B

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14. BODI GROUf

The safety sear 45 with spring 4.6 attached is turned s l ight lyanti-clockwise t o remove. The spring 46 should no t be separatedfrom th e sear 45.Fig. 25 Safety Sear

48---:1 49 /50Unscrew the magazine catch axis pin 47 an d remove th eholding open device 48 fran i t a seating. Eas e th e magazinecatch 49 and spring 50 from th e boccy. The spring 50 ca nnow be se parated from th e catch 49.

Fig . 26 Magaz in e Catch & Ho lding Open DeviceHB.B

- 2.515. BARREL GROUP

BB . 8

Unscrew th e handguard screwth e guards 52 forward.Fig 27 Han


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16 . MAGAZINEMagazines wil l only be stripped when it is necessary fo rcleaning purposes, excessive stripping wil l be avoided to reducewear on th e bottom plate .

54 53

2 55

Lift th e forward end of th e bottom pla te 53 s l ight lyan d s l ide it off th e retaining lug, remove the spring 54an d platform 55. .

Fig. 28 Magazine

INOTE: When assembling th e magazine it ia essential that the spring- i s positioned correctly between th e retain ing lu g an d th eguide lug on th e platform or stoppages rill ocour.

The coi l o f the spring can be seen through th e hole a t th eto p rear of th e magazine.17 THE UNIT SIGHr

Remove th e cover guard from th e Unit Sight by sliding itreanrards along th e retaining grooves o f s ight be d unt i l it is t ree .HB.B

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18 . :WADI:f\G AND UNU>.ADil'G( a) Loadi.p.g

(b )

(c )

HB.8

The cocking handle i s pulled:Ln.serted in th e guides ( f ig .firmly in to th e magazine. Tfrom th e holding open deviceLoading ca n also be done byfo r th e ''B" type r i f le .UnloadingRemove th e magazine and pul lth e cocking handle, press thmagazine.Changing MagazinesWith th e "A" type r i f l e th ismagazine in us e has been damunserviceable.With th e "B" type, since itr i f le , th e magazine must be

HORSE SHO E CLIP

Fig. 29


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(d ) FitJ.ing MagazinesAmagazine f i l l e r ( f 'ig.30 )can be used to f i l l magazines, i tis f' i t ted over th e mouth of th e magazine and a five roundclip inserted into th e guides, the rounds ar e then forceddown in to th e magazine.I f th e magazine f i l l e r is no t available r i l l ing by hand issimple and quick.

Fig . 30 Magazine FillerHB.B

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SEC1riON IV -19 . BACKWARD AND FORWARD .ACTION (f

(a ) Backward actionWhen th e t r igger i s pressedl i f ted forcing th e rear en dth e nose of the sear from thspring, which is under comphanuner f'orward to s tr ike th eThe f i r ing p in hi ts th e capblow ( f ig . 31 ) and detonates pel lant in the case, th e resalong th e barrel .As th e bul let passes th e gaportion of' th e gases enter tga s plug in to th e front endUnwanted ga s i s permit ted, bthrough th e hole a t the topgases striking th e head of

Fig. 31


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HB.8

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The piston, moving to th e rear, ( f ig .33) s tr ikes th e to pfront surface of th e bre ec h block s l ide, driving i t rearwards.The pi s ton, on be in g driven to the rear, compresses th episton spring, an d when th e gases in th e cylinder are spent,th e s prin g f orces th e 'piston f orward. Gases in th e cyJinderar e f orced ou t of the gas escape holes a t th e forward en d ofth e cylinder.During th e backward movement o f th e breech bloclc and s l idethere are a number of actions taking place.During i t s in i t i a l movement, the s l ide l i f t s th e rear end ofth e breech block from the locld.ng recess in th e body, and th eblock can now move rearward with the s l ide .The empty case, which i s held by th e extrac tor , is drawn fromth e chamber and a t th e same time th e rear bottom surface ofth e s l ide is forcing the hammer back agains t i t s spring unt i lth e upper bent of th e hammer is f inally engaged by th e safetysear .The base of th e enpty case ( f ig .34) i s brought into contactwith th e to p of th e ejec tor , and th e case i s forced o ff th eface of th e breech block an d ou t of th e ejec tor opening.

ll ' ...... - ' --

-31-

During th e backward movement this engaged with th e end of th ecanpressing th e spring in th eworld.ng parts i s f inally brougth e slide coming into contact When the breech block has moveclear th e magazine (f ig .36) , tupwards an d positions the next

Fig. 36

HB.8

-33-


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'

I .

-

-32-

(b ) Forward ActionThe breech blod


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-34-

20 . TRIGGER MECHANISMINI'RODUCTIONPositioned direct ly above th e rear arm of' the t r igge r i s th echange lever spindle. This is formed with a f 'lat surf'ace whichpenai s ~ d movement of the rear arm of' th e t r igge r .I t i s th i s movement which determines th e posi t ion of th e searin rela t ion to th e hammer bent.A second surface, formed by th e circumference of th e spindleensures applied safety .

(a ) S!ngle Shot (figs. 4 0 - ~ 7 )

'::::::::::J

HB8

Fig. 40

When th e change lever is pu t to R th e f l a t stn"faceis immediately above th e rear arm of th e t r igger . Thehammer is held by th e nose of th e sear engaging in th ebent. The r i f le is reaczy to f ire .

-35

Fig . 41

When th e t r igge r is pressedt r igge r pivots th e rear arm of tth e nose of th e sear from th e hafozward ~ d e r th e impulse of thef'i r ing pin . The sear, on beingmoved forward by i ts spring tmtt he step of th e t r igger. The nohammer s'Pindle.

Fig. 42

IIB. 3

During th e backward moveof th e breech block sl ide rotan d downvrard.s.

-}1-


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1\\

1\

- :S6-

Fig . 43When th e breech block is at th e rear , th e h ~ ri s held down by th e 'lD'lderside of th e block. The seari s na N posit ioned behind th e bent bu t no t in contact.

HB.8

Fig. 44

As the breech block moves forward th e hammer followsunt i l th e upper bent contacts th e safety sear.

Fig . 45As th e breech block sl.ide t rb,amlller again mc:Nes forward bu t is

].alrer bent .

Fig. 46On rel.easing th e triggeforces th e ).awer arm of th eth e rear arm. The sear i s nh,anllller forces th e sear sl.igNOTE: The tJ:igger must be.__ shot can be fired.

IIB,8

-38--39-


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:::::::::,

Fig. 47

SAFEWhen th e change lever is pu t to sa:f'e th e rounded partof the spindle is directly over th e rear arm of the trigger,

an d prevents i t from r i s ing to engage with the t a i l of th esear.

(b ) .Automatic ( f igs. 48-53)A type of change l ever oa n be f i t ted which permits ime r i f l eto f ire at the autcmatic ra te .Externally, this lever is th e same shape, but has th e l e t t e r Astamped an th e detent housing. Internally th e spindle has asecond f la t surface deeper than th e one used for single shotf i r ing , this surface permits th e rear a1'!ll of th e t r igger to beraised muoh higher, and in consequence th e nose of th e sear tobe well clear of th e hanmer spindle.The sequence of actions which follow th e pressing of th et r igger is th e same as in single shot, so also i s th e sequencewhen th e rounQ. has been fired except for th e behaviour of th esear .rl.l3.8

===:J

Fig. 48When the setety lever

suri"ac8 of the spindle is at r igger ' th e heJ!IIler i s heldbent. The r i f l e i s reaiiY

Ill\ . f.l

Fig. 49On th e t r igger being

and st r ikes the f i r ing pinose of th e sear i s well


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HB.B

-40-

~

Fig. 50

The hammer is held on th e saf'ety sear unti l t r i p p e ~th e sear in no wa:y contacting th e hammer bent.

When th e sa1'ety sear is tripped th e h.amaer i s releasedan d goes forward to str ike th e f ir ing Pin. The ri1'le willoontinue to f i re a t th e automatic rate unt i l th e t r igger isreleased or th e magazine is eJI!Ptied.

===:::J

-41

Fig. 52

When th e t r igger is releengages th e hammer bent.

~

IIU. 8

Fig. 53SAn:-- When th e change lever isportion between th e two surfacoperated as in single shot.


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-42-

21 . HOlDING OPEN DEVICEWhen th e l a s t rOWld has been f'ed ou t of' th e magazine, ( f'ig.54- )th e platform r ises under the action of' th e magazine s p r ~ . Therear projection on th e platform (55) engages th e stud (56) on th epi l l a r (57) of' th e holding open device an d f'orces i t tlp\Vards.The to p of th e device bears on th e underside of th e breechblodc, unti l cleared by the backward action, when th e holding opendevice moves up into th e body an d checks th e forward movement of'th e working par ts , by engaging with the f'ront of' th e breech block.The holding open device can be released ei ther by:- '

(a ) Pulling back th e cocking handle, when th e holding opendevice spring will force th e device clear of th e breech block(b ) Depressing th e holding open device lever .

HB.B

- 4 - 3

SEariON V - srOPP.AGES ANDThis section summarizes th e mecand the i r remedies. I t i s not intenbut as a guide upon which ins t ruct io

22. CAUSES OF srOPP.AGESAlthough th e l iS t mentioned herno t be ,thought they wil l occur. l!oor abnormal. conditions an d oorreot mtheir ooeurrence down to a mininnun.The following ar e th e main causEmpty magazineFailure to f'eedHard extractionFrict ionInsuff ic ient ga sObstruction in th e chamberBroken or worn p.u-t

(a ) ~ t y ~ a z i n es Wi occur automatical:cyat th e rear .

(b ) Failure to feedIn th i s case the breech blockThis stoppage rray be due to icocking handle is no t releaseto a dir ty or damaged roWl.d, obstruct ion fouling the facerear face of the breech.( o) Hard extractionThe empty case 'll'll.y be in , or

This stoppage i s caused by aextra work, th e gases ar e no tManual operation wil l cause tonce th e dir ty rowld. i s clearfur ther trouble.( d) J'r ictionThis stoppage '11J1J3 resul t f'rom

di r t , fouling in th e aylind.elubr ication on th e recoiling

l ii i . S

The breech block mey be aeywoperation may remed;y' th e stopcleaning wil l completel;r cure

- 44- - 45 -


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( e ) I n s u f f i o i ~ t GasThis stoppage shou ld only occur ei ther oor d i t ions ar eadv erse or ab normal, or when t he user has -not f ired th ebefore an d in consequence does no t know th e correct sett ingrequired.Adjustment of th e regulator i s eas i ly an d quickly done asexplained in Secti on VI para.27.( f ) Obstruct ion in th e chamberThis is caused by a separated case, the fozward en d of whidlremains in th e chamber. The next round to be fe d wil l gopart ia l ly into th e chamber and th e breech block wil l bestopped about half way foxward,(g ) Broken or worn parts

In investigating the cause of such a stoppage, looking intoth e body an d dlamber should disclose to th e f irer whichpart is at fau lt .A round in th e chamber with th e oap struck indicates abroken extrac tor or extractor spring.An unfired round drawn ou t of th e chamber on cocking th er i f l e indicates a broken f i r ing pin.I t i s th e respons ibi l i ty of th e armourer to dl.ange brokenparts .

23. REMEDY IMMEDIATE ACTIONMost of th e stoppages which may occur can be remedied by th euser applying an immediate action. There are two things he must doi f th e r i f le fa i ls to f i re : -1 Grasp th e cocking handle2. Look into chamber an d body

and from what he sees, apply his immediate a ct ion as follows:-,.(a) I f th e working parts ar e to th e rear

Clip loadi i ) Pull back th e cocking handlei i i ) Continue f i r ingwith th e "B" type r i f le , change th e magazines.

( b)

HB.8

I f th e working parts are not fu l l y foxward-( i ) Use th e auxiliary cocking catch and pull back t o th es t op( ii'). Release th e cocking handle( i i f ) Continue f ir ing

(c ) I f t he wo rld.ng pa r t s are fu l ly fPull th e wo rking parts fu

i i ) Release th e cocking handii i ) Continue f ir ing

24. REMEDY STOPPAGESI f afte r applying immediate actiomagazine) t h e r if le f i res one or two runload; adjust f or more gas; load an dI f th e r i f le f i re s one or two rouadjustmen t of r egulator unt i l co r rect I f a ft er immediate action th e r i

( a ) Hold th e cocking handle back(b ) Hook up th e holding op en dev ic(c )(d )(e )( f )

Remove th e magazineClear 8IJY round or empty casePut in a f'resh magazineContinue f ir ing

- 4 . 6 -


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SEOI'ION VI - C A R E ~ CLEANrm. AND MAIN!'ENANCE25 . CI&NING MATERI.ALS

The Pllllthrough is made up of' a metal weight an d a cord. Theweight i s pointed an d can be used to remwe hard :fouling :fran th ega s plug.The cord has two loops s i tuated about two th irds along its

length, one for us e with th e wire gauze, th e other for f lannelet te .A third loop a t th e en d of th e cord i s used to ass is t removal o fth e cord should it ja m in barrel or cylinder. ox s';,lThe o i l bot t le i s th e nonnal type wi th th e spoon. Undercondi iona the bot t le wil l be k ept f i l led with ~ (Oil 'A'Pullthrough an d o i l bot t l e a re st ore d in th e butt :" The o i lbo t t le wi ll be put in screw to p f i r s t , f ollowe d by the cord whichwill be coiled t igh t ly . The butt trap retains these ar t ic le s inposition.Normal service f lannelet te i s used fo r cleaning th e barrel an dcylinder.Rags or cotton wa.ste wi l l be used to clean th e remaining par tsof th e rif;I.e.NO .ABRASIVE MATERIAL OF .ANY KIND WILL BE USED TO CLEA.I'l THEIFLE.

26 . BEFORE FIRIN}The r i f l e wil l be f ie ld s t r ipped an d a l l parts exposed wi l lbe dr y cleaned. Before assembling, each part wi l l be examined fo rwear and burrs.Worn par ts must be exchanged an d burrs wil l be removed by th ennourer.Par ts wil l be oiled or l e f t dry as under:-

OILED

Piston spring. Inside breech block s l ideGuide r ibs .Breech blockLocking shoulder recessGuide groovesHolding open device:Magazine catch

HB.B ..

LEFT DRYBarre lGas CylinderGas PlugPiston, especial ly th e forwardend and between th e r ingsUpper Surface

Face of block

Magazine platformSights

- 4 - 7 -

/. GAS REGULATORThe ga s regu:tB..tor wi l l be adjusteScrew th e ga s regulator to the r ig

lhtm unscrew one an d a ha l f turns.The outer surface of th e regula top n l l i t i o n ~ bu t if i t 'i s no t possible toaf


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SECTION VI I - ZEROIID.NOTE: Figures quoted in this section ar e based on the metricthreads of th e screws# and have been a rri ve d a t by t r i a l scarr ied out using one r i f l e only. .-

They ar e therefore approximate and may vary when th e th read shave been converted to unif ied threads.

31. The r i f l e i s zeroed before issue to th e user# bu t it mayr equire some at tent ion to correct for elevation and direct ion .Zeroing i s carried ou t by a qual i f ied armourer, who wi l l be inpossession of th e specia l box--type spanner fo r moving the fores ight,an d th e normal type spanner fo r moving th e "B" type r i f l e s ight .

(a) Correction for ElevationErrors in elevation are corrected by screwing the fores ightup or down. If ' it i s screwed up , th e M.P.I. wi ll be moveddown and vice-versa.A spring de t ent locates and holds th e fores igh t in position,and th e outer circumference of the fores ight i s serra tedinto twenty equal divisions, the two form a clicking device,which wil l assis t t he armourer when calculating movementof th e M.P.I .One division (or click) is equal to 1/10 inch a t 25 yards.or 4/10 inch a t 100 yards.

(b ) Correction fo r Direct ionErrors in direct ion are corrected by moving th e backsightto th e r igh t or l e f t . If th e M.P.I. i s to the RIGHT th escrew on th e l e f t of th e s ight is loosened, an d th e s


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