PS Magazine - TB 43-PS-574
PS, The Preventative Maintenance Monthly
ISSUE 574
SEPTEMBER 2000
PS 574
46
SEP 00
M16-Series Rifle, M4A1 Carbine . . .
he M23 mortar ballistic computer has
made fire plotting easier for mortarmen.
But that doesn’t mean you should forget
the M16 and M19 plotting boards.
If the M23 computer fails in the field, you
will need the M16 or M19 for accurate firing.
If they’re not in good condition, you’re in no
condition to fire.
As part of your before-operation PMCS,
check your plotting board. If it’s beat up,
get a new one. Order an M16 board and
accessories with NSN 1220-00-602-7941
and its replacement azimuth disk with
NSN 5355-01-452-9633. Order the M19
board and accessories with NSN 1220-
01-059-7989 and its replacement plotting
scale disk with NSN 6675-01-077-4377.
Instructions for using the M16 and M19
are found in TM 9-1220-243-12&P.
Mortars . . .
just 'cause
you mortar men
have got them
new-
fangled computers
,
don't forget
about
me!
Find a stuck
bullet? Leave it alone.
Your armorer removes
stuck bullets.
No bullet? Then you
have a spent casing
that didn’t eject. Use the
cleaning rod to poke
out the casing.
aak!
i've got a
stuck casing
!
anybody here know
the
heimlich
?
4.
Visually check chamber for bullet
1.
Remove magazine
2.
Lock bolt to rear
3.
Turn selector lever to SAFE
5.
Insert cleaning rod into bore from
muzzle end and feel for stuck bullet
M2, M3, M296 Machine Guns . . .
Gauging Your Gauge
I
f you don’t headspace and time your M2, M3 or M296 machine gun before
you fire, it will either fire poorly or not at all.
But if the headspace and timing gauges are in bad shape, all your timing and
headspacing will have been worthless. You will still have a weapon in no shape
to fire—and you won’t even know it.
That’s why you must eyeball the
gauges as part of your before-opera-
tion PMCS. If they’re pitted, rusted,
bent, or broken, they need to be re-
placed. NSN 5220-00-535-1217 gets
both the headspace and timing
gauges.
Gauges rusted, pitted, bent or broken?
PS 574
47
SEP 00
stuck round in your M16-series rifle or
M4A1 carbine can stick you if you’re not careful.
If you hear an unusual pop while firin
g...or
if you have reduced recoi
l...or if
your
rifle or carbine fails to chamber a new
roun
d...
STOP FIRING! WAIT!
You may have a round stuck in the weapon’s bore.
Here’s the drill for checking out your weapon:
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