Prototype FAL Report

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FABRIQUE NATIONALE

D ARMES DE GUERRE

HERS TAL-LIEGE

BELGHJM

F N

D E S C R I P T I 0 N

of

A U T O M TIC C A R B I N E

l ::;::11troducti nn 1

2 . Ge nera l clmra c t 8r i s t i e s 2

3. Gone r 01 p r t i cu1ars 4

4 . Op c r = t ions o.f m0chc' '.nism 5

5 Car8 and mHin t enance 12

6 . Stoppage s 14

li'ebruary 1950



I NTRODUCTION

FJ;.BRI QLJE NATI ON;\LE D' AR':iES DE GUERRE , S . A. Hers ta l n ea r - Liege ( Belg i ll_m) , pres en t th e pa r t i cu l a r s of th e i r new in fa n

t r y weapon wh i ch th ey ha ve d <.; s i r n ed to f u l f i l th e r eq_u i r cment s ofmode rn inf :::mtry . A.s a r esu l t of th e cxue r i e nce and knowl edge ga i n e d on a ll f r onts ~ u r i n g the l a s t war , th e t a c t i c s of mo de rn i n f an t r y hav E; und e r g one some change . I t i s no longer consid e r e d pro bab l e t ha t th e r i f l e will be u se d e xcept a t short rang es or th a tth e li gh t machi.lk t:un 'Nill i nf lu enc e t h bs t.t l e a t ranges gr ea t e rth a n 600 - 1 . 000 ya rds .

In t h i s c onc ep t , it i s poss ib l e to con s ir : e r th e abo li t i on of s e v e r a l of th e pre s en t a rm s wh i c h ire a small a rm ca r tridge and to r e plac e th em by a s in gl e mo de rn weapon . . i th t h i saim in v i ew :F . N. ha v e des i gned th i s new arm e:nbodying ma ny of th e

charac t e r i s t i c s of th e ma chine C rb in e a nn th e se l f loading ri l ecombined with o ca r t r idg e Nhich i s mo r e:: a cc u r a t e ano powerfu l thanth a t o f th e machine carb ine but lighte r :1nd shor t e r than th e ri l eca r t r idg e . This combina t i on will give t o th e in fant ry one weap onto r t.pl a c tJ th e machin e cLJ.rb in c , magaz in :e ri l e a nd se l l oad ingri l e . Fitt e d 1N i t h a light b i pod , which i s eas i l y ca r r i e d in th epocke t , it can ac t a s a l i gh t machin e 81-ln in f i r i n g sho r t burs t s

with adequ a t 3 accu r a cy up to r n ~ c s of 600 yards a n ~ ev e n l onge r .A p l o. to on compl r· t ::: ly O.Yl1H . d wi t h t h i s w c ~ : p o n c o_n de v e lop a r a t e o f

f i r e a n d power r c : : ~ r th;__n th :..t possesse d by th e presen t da yp l a toon .

The snv ing in tr:1 i n in g t im e , ma.i n t c na nc e a nd product i onby h :.1 ,r in g one weapo n to r t. pl tJ. c e t h r oe o r four d i f f e r ent typ es needsno s t r es s ing .

The n ew d s ign i s ~ on a l ock in g sys t em a n me thodof ga s op :; r a t i on which h :J.s b t_;c n d ev e loped a n d t ho roughly t e s t e d by

F . N. ove r 2 pe r io d of m:tny ye :1r s . In pr inc i p l c , i t i s th e. s·J.me o. sth e F N . SL. l lo a d ing r i f l e:: whi ch h .:.1s prov e d s u cc e s s fu l in ma ny

t es t s and i s in product i on fo r S8VGr n l count r i e s .

Th e; n ew wcu.pon i s of th ,: minimum we i gh t co ns i s t en twith s t a b i l i ty a nd wi th out exc ess iv e. r eco il . I t combines ligh tn ess

withr o u s t n e ~ s

of 3.1 1 work i ng c ompon _n ts , a n ex t e r i o r f r ee f rommovin8 part s uns i gh t ly o r n ~ r o u s exc r e ss ences , a nd a compl e t e ly enc l os e d mechan ism t o e nsure cc r t c: i nty of f unc t io n ing und e rth e wo r s t c l i ma t i c conC\it ion s . I t h :ls l ehind it t h e:: nc cumul a.tionof k n o ~ l d g e ~ n d <.; Xp e r i en ce of F . N. a n th ey pr ese n t t h i s de s i gnas on e tri e d dn d t ~ s t d b8 s cd on sound or inc ip l e s J nd withoutf eu. r tha t yeo_rs of d -eve l opmen t wi l l be r equire d to b r in g i t to

perfection . Th ey rr r e confident t hat t r i :.: .. l s wil l s how t h e n ewwea pon i s it ::md r Gady fo r duty with mode rn i nfo nt ry .



2

Ci UERAL CHARACTERISTICS

Several models have been prepared which are basedon a common design but have been f i t ted with barre ls ofvarying length and v ~ e i g h t The following i s a br ie f summaryof the principal charac ter is t ics common to a l l models.

l . Me thod of Operation The weapon i s gas operatedwith an adjustable regulator to ensure certa inty and smoothness of operation without excessive recoi l . The breech blockis mechanically locked before f i r ing can take place and i snot unlocked unt i l the bul le t has l e f t the barre l . The breechblock be ing in the forward. posi t ion when the t r igger i s pressed, there i s no disturbance of aim due to a heavy mass mo -ving forward, a drawback in many automatic weapons. Afterf i r in g , the mechanism extracts the f i red case and f ee ds a ne wcar t r id ge in to the chamber so lon g as there are rounds inthe magazine. When the magazine i s empty,the breech block

remains to the rear , and ind ica t e s to the f i re r the nee d toreplac e th e magazine.

2. Stabi l i ty By placing the gas cylind er abov ethe barrela n a u y - ca r eful a t t ent ion to design t he l in e ofr ecoi l has bee n kep t as low as possible , resul t in g in a direc tthrust a tsa ins t t lB ·fi r er s should er . l his fea tu re and th elow c ent r e of grav i ty [ iVG grea t s teadiness during f i r ingand r educe th e o n d ~ c y of th e barre l muzzl e to be thrownupwards. The f i r er i s tht:;re fo r e able t o ke ep his s i ght s onthe t arge t wi h o t ~ t f f i c u l ty .

3 . Cras 1{e t ula tor This i s designed on th e exhaust-principle, in that the r egula t or only a llows suff ic ient gasfor co r r ec t functioning to act on the piston, the surplusbeing vent ed in to the a i r . This ensure s that foulin g is kep tt o the minimum.

4 . Sighting A ro bust ape r ture back-sight , gradua-t ed up to blio yard s i s f ed on th e butt hou s ing 3nd n

l ~ d f ore s i ght ~ i t h s t r0n G p r o t ~ t o r ~ i s f i x d a t t hef on•;a.rd end of t lw c;as cyl i ndcr .

5. Stripping Strip pin g a nd a ss embly fo r c l eaningand norma l maintenanc e can be done without the ai d of any

t oo l s . The but t being hinged enab l es t he i nt e rnal mechanismt o b ,:; withdrawn quickly for the r ep l ac ement of any par t orfor oil ing or c l eaning.

6 . Me thod of Fee d Is from a maga zine hous ed underthe body. I t s capacity i s 20 r ounds . The number of r oundscan b e incre a sed. but th e grec:tt ur l ength of magazin e may makeholding and f i r i ng cl.ifficul under cer t c:1 in conditions .

7. ~ e e t h r ~ r o o f n e s s Al l op enings such a s thee j ec tor openi n·0- ; a :r t l y coven :: d a s a s c:tfeguardaga i ns t dust and ::1ud .



3.-

8. Por tab i l i ty The wei ght and l ength of th e newgun give it l ;he s ame handine ss as a l ght r i f l e . F i t t ed witha should e r pi c c ' i :u place of a but t t is ideal for a i rborn e troops.

9. Ca l i b re Whilst th e pres ent weapon has been

design ed for a · spec ia l cartr idg e t can be adapte d to useth e short 7,92 round or the normal r i f l e car t r idge o r anyammunition within thes e l imi ts .

10. Acc essor i es Th e de sign permits of th e a ddi t ionof var i ous a cc essor i e s i f r equi red e . g .

(1) Bipod(2) Flash hid er(3) Muzzl e bra ke(4) Bayonet(5) Grena de l auncher .



4.-GENERAL PARTI CU LARS

--·-----------------,----------------r----------------,-----------------1. WEIGHTS 1 Short barrel 1 Long barrel Short model

2.

3.

4.

5.

6.

7.

8 .

9 .

a) Gun without I 8 lbs 10 l / 3 oz' 8 lb3 15 oz 8 1bs 10 ozmagazine I 3 kgs 920 I 4 kgs 050 3 kgs 910

b) Gun with emp- 9 1bs 2 oz I9 1bs 6 2/3 oz 9 1bs 1 2/3

ty magazineI

4 kgs 140I

4 kgs 270 4 kgs 13 0c) Gun with fu l l

magazine r 10 1bs 110 1bs 4 2/3 oz 9 lbs 15 2/3130gr .bu1lets 1 4 kgs 535 I 4 kg s 665 4 kgs 525

I I

Gun wi th fu l lmagazine I 10 lbs 2/3 oz 10 lbs 5 l /3 oz r 10 lbs l /3 ozl 40gr .bul let s 4 kgs 555 I 4 kgs 685 4 kgs 545

I

d) Bipod I 9 oz ·I 270 gr.

e) Ba r re l r l lb s l l oz 2 lb s 2 lbs l /3 oz2I 780 gr . I J l O gr 918 gr .

LENGTHS

a) Gun Overa l l 3 Ft 2 in.7 8 I 3F t 5 in.73 2 Ft 9 in.850 , 985 m. I 1, 060 m 0 ,860 m

b) Barrel I 19 i n . l 22 in 05 I 23 in 03I 485 cm I 560 cm 585 cm

c) Bipod 12 in.l25308 cm

METHOD OF OP 8RATION Gas

METHOD OF FEED Fix ed ma ga zine - 20 round capacity

LOCATION OF FEED

OPENING

LOCATION OF EJ ECTOR

OPENING

LOCATION OF COCKING

HANDLE

SI GHT BASE

SIGHT GRADUATION

Underneath

Right side of body

On sl id e ,hou.se d on l ef t of body

22.16

563 mm

22.16563 mm

p t o 600 yar ds in l OO yards steps

20.44

520 mm

lO.RIFLING OF BARREL a) Type of Ri f l ing Squareb) Number of grooves: Four

oz

oz

c) Di r ect ion pitch: Right handed,l in8.66Ks.

l l . RATE OF FIRE 550 r.p.m.



OPE;RATION OF M E C H A N I S ~ 1

rJ . -

1 . 1 _ s : > a c t ~ ~ g In i ti ::=d cockin f:, i s by hand, using thecockin g handL :: s i tua tnd on tl:J e l ef t s ide of th e body. Thel e f t ha:nd i s us e d .foT coe:<:in . ·, l eaving th e r igh t hFtnd on th ep i s t o l e;rip ::- c: ady . tor i ~ i n g As th e c o c k i n handle does notmov e dur t n;; C j _ r i ~ t h c r e i s no cbngcr to th e f i r e r s face or

in t c r f :; r e11cc with atming .

Rll l lng th c cocking handl e to th e r e a r with draws th e breech block and compre sses th e r 2tu rn s p r i n g ~The b ree ch block i s h old in t h i s p os i t i on by th u holding

p n d ev ic e . The lo aded m;;gaz in e i s now p l e:: ce3d. in th e_, maga zine housing and r e t a in ed in pos i t ion by th e mAgaz in 6 r e t a i ning ca tch. The bree ch i s now c losed by p r s s i n th e stud on

th e l ef t neF.J.r the magazine r e t a in ing ca tch, 'Nhich al lows th eb ree ch block to run forward und er th E: i n f l u enc e of th e r e turnspr ing . The n :: tu rn spr ing i s hous e d in th R bu t t and a c ts onth e b r e: ech block slid<:. th rou gh a rod p i voted on its r ea r

fac e . During t h i s moveme nt , h b r ~ ~ - ; c h block ca r r i es a roundi n to the chamber a nd th <: ex tr c:1c to r ong .f. l,ze s th e r im of th ecr ' lr tr idg e . The f ,UD i s now load ,·; d nnd r ee1dy to f i r e .

2 . Fi r in g CycL; On th e l uft s id e of th e body i st h ch<J.nge -I·.; v ;:::; r wnich cHn be s e t a t s efe ,o r fo r s ing l 8 shot ,or ..mtomRtic f i r i n g . ·rh\; th:n::c pos i t ions are wide ly spa c edso tha t th e s ..:: t t i n ; ca n be ft;l t in t hc.: c1.:1rk.

S e t th '-' change l ev e r El s fo r s ing l e shot f i r ing . Thet r i ~ g e r now be in g r s s d t h hamme r i s r e ~ 8nd s t r i k e sth n r uR r face: of' th e f i r i n g p in which fires th e c a r t r i d g8 .t should be no t :;d t h q t t h ._. b r e :· cll bloc}:: br: in g nl ready in

th e lock ed. pos i t ion , th e r e i s o Cli s turb nnc ·:: of a i:n th roughth e mass o :C th e c h b2.ock movj_ng fo rvmrd .

As t l1L bi.lll c; t l e :::v :; s tll c bore of t h e; ba r re l t

f th e follOV'I i ng csr: s ·_ ; p s s t l l rou -;h the gas por t i n to theforward _pc,rt o:f h V-:rr(:l i ·-1to th e g::t s cyl ind e r . He r e , by

means of th ,:. g .: \ s n : gu l Tto r m ly , s u f f i c i e n t gas i s us e d to

ensure thrtt th 0 pis ton i s dr iv en n :<l rw8. rds with su f f i c i 0n t

power to op e r a t e th e rn ec lwnism, th e r ama ind er of th e gAsp:J.sses to th e open :=tir th r ou gh hol e s i n t h ~ . . ga s cyl ind er .

Fiq 1

The pis ton P in i t s r e::-n . vvn rd mo v c. men t s t r i k e s thebreach b lock s l id e S a nd dr iv e s it bAckw2 rds . Se e pos . l .



6 .

C 2

1The r amps t of t he b r ec: cll block s l id e now engage t he

cnm C on t h e brc;e ch block Sec pos 2.

III - -L ~ L

.______....... r-t-.-:.....,......,..>....£. fiq 3

a nd li f t i t out of g c . m ~ . 11_ th th e locking should er Ain th e: bociy a nd th ,; n c t i on i s un lock ed



7.-

The b r e ech block s l id e And b r e ech block now tra ve l

to th e r ea r tog e t hE::r, _q n d in t h eir pas s age ro t a te t h e hamme rto i t s c ocked pos i t i on (s ee f i gu r e s 8 t o ll . During th i smovement , the c;xtr : c tor has wi t hd ra wn th e f i r ed case from t hechRr1b c r un t i l it s tri ees t he e j ec t o r f i g .l2) when the casei s t hrown out of th r; gun t o r igh t .

ft or p is ton has s t ruck t he bre e ch block s l i d ec md i r:Jpc:r t cd the nee ;S s nry imp E tus , t h e p is t on sp r i ng whi ch

ha s been c o·:rpressed , reP.ssert s i tscl . t and r e tu rn s t he: pis ton

t o th e forvm r d posi ti on . r: hc rc t rw a r d 8.c t i on of t he mecha -n is m i s now o n p

Fiq 5

Th e fo rward ac ti on i s caus e d by t h e r t u r n sp r in gwhi ch hav ·· bee n fu lly compr.c:s:;;cd dur i ng th e r ea r wa rd mov c -

mcnt ,now d r i t h e b re uch block s l id e and r ~ c h bl ockforward. (s ec pos . 5) . Lur i n r:; t his r:1ov c rn e n t , the n c h b l ockpus h e s a r ound. f ro m che magaz i n e forwa rd and in to th e cham -be r .

q 6



8 . -

When the front of the breech block reaches th ebarre l face th e bre ech block s l id e act ing on the shouldersof th e breech block forces the breech block down into engage -ment with th i s lock ing shoul de r thus locking th e act ion seepos.6)

The breech block s l ide co ntim1es i t s movement aloneunt l t r eache s i t s forward posi t ion where t i s he ld inplace by t he r e tu rn springs. As the breech block i s loc ked in

posi t io n th o e xtrac tor engages · the rim of th e car t r idge inr eadiness to x t r c ~ th c round . The f orward act ion i s nowcomple t e and th e gun r eady to f i re .

The a1)ove describes t he mechan i ca l movements whent he change lever i s se t for s i ngle shot f i r i ng . When set forautoma t ic f i r i ng , the sequence of events i s the same exceptthat the ha mmer i s automati ca l l y r eleased to f i r e the car t r id ge so long as t he t r i gge r i s kept pr essed . This i s morefu l l y described un de r the action of the t r i gger me chani sm .

Thes e t wo compo nent s contro l th e amount of gasallow ed to act on t ~ pi s t on d . The ga s p lu g a i s f i xedin to e nd of the gas cs l in cle r b . I t has two pos i t ions;in one t per : n i ts fu l l acc es s of th e gas from the barre lto the gas c y n c h ~ Turned tbrough 180° t comple t e ly s topsa l l ntry of ga s and th e wea .. on w ll not th en function auto -maticRlly but can be opc:: r a t cd by hand . In th i s pos i t ion , t hegun ca n be us ed V li th a grena de lau..'1chcr as automa t i c act ioni s nr t r cqui r c:l .

The g s r egula tor c cons i s t s of a shroud r ound th e

end of t:be gas cylL1dcr and has t 'Jrce hol e s o dif f e r ents i ze s . ·ahcn t h;; l a r ges t i s op_:)( Si t r:: the corresponding hol ei n the ga s c y J i n ~ the anount of gas l uf t i n t he gas cyl i n -de r to ac t on th e pi s tn n wil l be small and may not be suf f i -c i ent to ope:. ra t c t h m ~ c h e : m i s m 3y turning to th e next sma l -l E. r hol e , morG ga s i s ava ilc:.tbl c to Cl Ct on th e pi s ton.

®®I

) \

fiq .

· · BARREL.

:\



9.-

4. Tri gge r e c h a n i s oThis i s arran ged to giv e a mechanical safe a pos i -

t ion for s ingle shot f i r i ng , and a th i rd po s i t ion fo r automat i c fi r i ng . The se t t ing of the mechanism i s indicated by th echange l e ver on the l ef t of the body which can be turn ed tothe r eques ted pos i t io n and a l te r s th e se t t ing of the mecha -nism by means of a stop on the arm of the change l ever.

Thus,when se t fo r s afe th i s s tud is in th e po -s i t ion shown a t A in f ig .8 and lo cks the t r i gge r mechanical -ly and prevents any possib i l i ty of a c cid enta l di s charge .

When s et for single shot f i r ing th i s stud i s asshown in f ig .9 wh en the hammer bent i s caught by the s ea reach tim e the hamm er is cocked, The s ea r mechan ism i s sode signed tha t the t r i gger must be r el ea s ed and pr ess ed aga inbe fore the next shot can be f i r ed .

When s et fo r automa t i c f i r e as i n f i g . l O th iss ea r i s he ld nut of cngqgernent and t he lmrnme r is control l edby s afe t y s car .

~7he fror:t nr snfcty s ear incorpora t ed in t he

m e c h u ~ i s r : has two funct:i em s . I t pre v ents t he hammer bein gr e l eas ed unless t ha bree ch bl ock and bre ech bl ock s l id e a r cfu l ly home and when s t1·ucl-:: by t he bre ech block sl id e a t th ef i na l moment of i t s t r av e l t r e l ea s es tho hammer and a l l owsthe t r i gge r t o f uuc i o n i n the no r ma l way. Whe n f or au -t oma t i c f i r e this s ea r c on t r o l s t he hnmrncr,which i s onlyr e l ea s ed when th2 bree ch i s clo secl (f i g . Y L and l ) .

lC

q 8

c/



10.-

Fig.9

-------- -

·-- _ . r = == :J

L = : ~ ...

~ ~ ~

Fig .10 .

--------------- -

Fig.



11 .-

/ ·.

< l 2

r.I __I I

The rr..:tuTn spri:1g i s ho:A.s e d in the bu t t and ac t s

th rou gh th e rocJ on th e r ea r f c ~ of th e b ree ch block s l id e .Thi s method nf hcusing hss considerable <J d van ta ges in tha tth e sp r i n g i s comp l et e ly pro t e cted agains t d i r t and acc i denta l dP..m<?.ge . It requi res no a t t en t ion unless it breaksor ~ i l s in s c ~ m e way an event whi eh wi l l be extrem e ly ra re .

6 . Hol_?ing open d e v i c ~ f i g . l3 )

This device which holds the breech block in there a r pos i t ion when th e magazine i s empty i s housed to t he

r i ght of the f ixed e jec tor .

It cons t s t s o a robus t p lunger opera t ed by the

re a r s ide of th <- ) mngG.z.ine p ln tform through a small pinac t in g in a s l o t . The p l u ~ 1 g e r in t t s nt,rrne l pos i t ion i sheld down by it s s p1·ing . W hen the pla t form o f th e magazinef in a l l y r i s e s , t h e pin i s pushed upwa rds by the p re s su re ofth e mag2zinc spr ing . l he plun p ;e r i s ra i sed to i t s fu l lheight when the magaz i ne i s empty . It thus pro j ec t s in th eforw Elrc·l path of th e b ree ch block a nd r <::t J i n s th e l ntt e rhere un t i l a full m>-te;azine i s f i tt<;d . To r e le ase t he cbviceth e breech b l o c l ~ must th en be withdrawn s l i gh t l y when th e

plungG spr in r; :re t r ac t s · th e p l u n g c r Ftnd the breech blocki s f r e ·3 to ;:10vc f orward .

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12. -

C A ~ B AND r::AI NTEHANCE

CLEA:LH :TG

a Ba r r e l : The bore of tlw barrel s ~ o u l d be kep ts l ight ly oiL:;Cfm-lC n not in us 8 , but should be clean and drybefore f i r i ng .

Af t e r f i r ing , ba r r e l should be washed out dr i ed a ndo il ed .

b) Gas Cylinder a nd Pi ston: The ga s ~ l u g should ber emoved and wip ed clean . A rod shoUld be passed down the gascyl inder to cle a n out all fouling . The pis ton should bewip ed c l ean .

a) Wor king Pa r t s : 11h t:' hn:ech block a nd bree ch blocks l id e s hould o e wi ped"clean and s l igh t l y oi l ed .

In gener a l qll moving par ts shoul d be kept lubr i ca t ed to ensure good f unctionin g but ov er lubr ic a t ion must

be ovo i ded a s surplu s oi l col l ec t s S8nd a nd d ir t and th egun wh en hot th r ough f i r i ng wil l b :t r ay ts pos i t i on bysmoke .

STRIPPING FOL : A i H AED E A N C Ec.o .: .c

l . I nt cr nn. l c h s i T J - S e:; ,; tl Dt th e: gun i s unload ed and thewc•r k1n g pa r t:::··-s.T , F ~ 1 W Push t l l8 but t lockin g l ev er o

th e l ef t r ear s id e of th e body downw8rds as fa r a s t w llgo . At th e t i rac , p:-ess th e but t c J.ownwctrds , wh en th , but tw ll pivot and op en t he gun in a s i ~ 1 i l 2 r ma nnc:r to op ening ashot gun . ·,/i thd:nwJ th 1:; br ee ch block and s l id e y means of

th e spr in g rod fj_x ed to t he sl ide . Rei:-tovc t l h ; body cover bys l id i ng t off t.hc body to th e r e .:-1r .

To sc.,p : .r a t e t h ,, br ,_: •sch block from th e s l id e , l i f tthe breech block by t he front end a t th e s ame tim e ke ep ingt pressed home in t h s l id e . C0ntinue l i f t i ng by th e front

end and so l ever out th e r ea r end g e n t l y ~ g ~ i n the pressu r e of th e f i r ing pin sp r i ng .

Tn r em ov e t he f i r ing pin ,push nu t the cross r e t a i ning pin whilst r c:; t a inin g hold of th e r t::a r n of th -:; f i r ingpin,which und er t h e p r e s s u r of i t s spring wil l be forc ed

out of i t s hous ing.

To r ~ m o v e : ; ex tr8c to r ins cr t t h ..; nos G r f a bul l etund c r t he ext ra c t or claw a nd push ( Utwa r ds and upwa rds wh enth e ex trac t or wil l be drawn out of i t s se :=tt i ng . These p e 1.r t sa r e now r eady for cl enni ng and oi l in g .

Re s ss embly i s qui t e simple by f ol lowing th8 ab oveins t ruct ions in th e r eve rs e o r d



13.

2 Gas a ffc c t e l . par ts - By c::; ns of the nos e of a ca r t r idg e turn t he gas p lug nnd r C: mov c i t The pi s ton a nd spring cannow be witl1dra wn f r om th e gus cy l ind er . Cleanin g of th es ecomponents can n ow be ct onc n d n rod pushed down th e go scylind er for th e s.r :l mc purpose .

R a m b l in t h r EVLr SC ord er

No fur th er s t r ipping i s necess a ry by the us erSt r i ppi ng of th r::: t r i gg\:j r mc cha nism should only be done bya t r a in ed armourer



14.-STOPP GES

Stoppages should be of rare oc currence i f properat tent ion i s paid to care and maintenance. Thei r pr incipalcause i s lack of gas power,which may be due to incorrectse t t in g of the gas r egul a to r , excess ive fouling on the pis tonhead or insid e the gas plug or gr i t in the mec hanism. Theattached ta bl e indicates the ty pe of stoppage, i ts cause and

cure.

T BLE OF STOPP GES

Stoppage Ca us e Remedyl ~1. Insuff ic ient ga s due t o wrong 1 . Adju st gas regulator

ad jus tment of gas regula tor or 1Ma lej ect ion: due to fouling af fec t ing th e 1 2. I f per s i s t ent ,c lean

act ion 1 and oi l working par t s- - - - T - - - - - - - - - - - - - - - - - - - - - - - - - - -

,1 . Insuffic i ent Gas 11 . Adjus t Gas Regu l a tor.

Failure 2 . Har d ext rac t ion due to di r tyto 1 chamber ,or poor car t r idge s

I

Extract 1 3 . Broken ext ra ctor cam.

1 I f s toppa ge s continue ,exa mine chamber andmechanism f or dirt etcor damaged ext ra c tor

I

13. Cl ean or r epl ac e brokenextracto r i f th i s i sfound.

l - - - - - - - - - - - - - - - - - - - - - - - - - - - -

1 . Insuff ic i ent gas to driv e the11 , Adjus t ga s r egulator

1 bree ch bl ock fa r :nough to the 1 2•

r ea r to f ee d the next round . Examine magazi ne andI r epl a ce i f nec essary

I1 2. Incorrec t ly f illed or damaged

ma gaz ine . 1 3 . Adjust gas r egul a torMi s f ee ds 1

I 3•I

Too much gas giv ing viol enta c t ion a nd causing the bree chblock to v r r i de t he rouhdin the magnzin c . Thi s s toppage 1

SHOULD BE NO TICED from the 1

viol ent re coi l .< J nd the di s tanc e 1

t he empty cas e i s throvm dur ing 1

e j ection. 1

- - - - l - - - - - - - - - - - - - - - - - I

1 . Def ect iv e car t r idge - mist ire 11,I I

Failure 1 2, Broken f i r ing pin 1 2.toFi r e . Di r t pr eventing br eE ch clos ing 3.

1 fu lly or di r t j 2mming ac t ion 1

of hammer. 1

l - _ I _

Re load

Change f i r ing pin

CleaYl gun

Fa i l u re 11. Too much gas as a bov eto hol d 1

11. Ad jus t gas r egu l a torI

Iop enGmptyma ga zine

I



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Prototype FAL Report

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