PS Magazine - MARCH 1984
PS, The Preventative Maintenance Monthly
ISSUE 376
MARCH 1984
No Mods
;, I
i
When can an M240 machine gun be modifed to Fed ±om the right sidE?
Never.
I² you need a machine gun that Feds ³rom the right, get an M2´0Cµ
Modi²¶cation o² either gun to change the direction o² Feding is not author-
ized. That's because the guns are identifed as separate models by the NSN's,
part numbers and serial numbers s·mped on tHe receiver¸
Unauthorized changes would screw up the system used to keep tabs on the
weaponsµ
Also, remember that the barrels ¹r M240ºseries machine guns are not inter-
changeable with other guns¸ You get 2 barrels ²Or each gun at issue. They are
matched to the receiver» ¼ach Barrel and bolt is checked ¹r ft and head½spaced
to that receiver. That prevents r¾ptured caRtridges, damage to bolt, barrel and
receiver and injury to usersµ
I² a problem develops with one o² the barrels, don't go looking ²Or a spare.
Turn the gun and botH barrels in to your DS unitµ They'll t¿ke care o² it¸
Gas _Por ScRAping
Knives, screwdrivers, "PÀ38'sÁ or
other
improvised
tools
add
up
to
damage
and
malÂnctions
when
it
comes to cle¿ning the center Ãole in the
gas
regulator
plug
o²
your
M240
machine gun.
The
ony
tool you should use to clean
or scrape carbon ³rom the regulator
plug is combination regulator scraper,
NSN 4933Ä01º033Å1504µ Æse reamer,
Ç NSN 4933È1º047É3394, ²Or gas inlet
Holes 1, 2 and 3» Any suBstitute tools
MAR B
7
can round out the holes and cause
malÂnctions»
Ê
Armorers who set up M240's Ëor
trainÌng missions (or gun crewmen with
an urge to tinker) should be sure tÃe gas
regulator plug inlet settings are on
No»
l.
Setting the gas port on Noµ 2 or 3 inÍ
let is
.!l
intended to increase the rate
o² fre. THey only help maintÎin the rate
o² ³ire when carbon builds up when it's
cold or dusty¸ They put an extra load
on various parts o² the weaponµ Those
2 settings are not Ïr norm¿l conditionsµ
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