PS Magazine - JULY 1972
PS, The Preventative Maintenance Monthly
1972 SERIES, ISSUE 236
JULY 1972
Clean the gas cyLinder and piston with rifLe
bore cLeaner only. Anything sharp or abrasive
could rUin it. StUbborn carbon can be removed
by yoUr armorer who has the carbon removing
compound ±o do iT wiTh.
You don't have ±o clean The gas cyLinder
every Time you clean your weaPon. Do iT only
if your weapon acts·slUggish or yoU get a shorT
recoiL or the piston will noT move Under its own
weight. ²aking the cylinder aparT too ofTen cuEs
down on its liFe.
After some Use yoUr gas pisTon turns brown
and then bLack³
Leave this color be because
you can only mess things up if yoU try to
scrape it oFf.
´se no oil on The piston except in
hoT, hUmid, clImaTes. However, yoU lube the
_gas cylinder if The gun is noT To be Used For
a time.
YoU can pUT tBe piston into The gas cyLinder
eitBer way but it works right onLy if yoU pUt it
in with The piston head (soµid en¶) facing towar¸¹
the stock of the gun .
± ² ³ OR TO P´T IT
ANOTHER WAYµ
THE OPEN END
¶ACES THE ENEMY
20
1·
¸
¹º
BER
-fouled with carbon
And metAL. wo±n, pItted²
BARRL
» ¼
½¾
T
-Cracked,
burred, eroDed²
¿ÀÁÂ
-Locking
wire
broken.
BUFFER AND OPERATING ROD
Á
ER
³Springs weaK, body cracked, dented, plunger
heAd worN´ crAckeD²
Never oil The buffeR or dUnk it in solvent. ºF it»s
noT working righT, replace it ¼uT don»t try to repair
it.
Ãhe new hydraUlic bUffer is never disas-
sembledÄ Åeplace if leaking.
»
RA
T
I
N
G ±OD
,
µMB¶V
-·
roken,
bent, cracked² ¸oLLer missing or ±ough,
Nicked, does Not move F±eely² Sear notch
worn, burred, rouNded²
·
(
Shou
l
d be
sharp²)
D±IV³N´ SPR³NG
(Operating ±od Spring)µ
Worn,
kInked, broken¹
(F¶a¸ p¶aces on the
spring are a sign of rapid ¹ºar²)
2Æ
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