PS Magazine - TB 43-PS-629

PS, The Preventative Maintenance Monthly

ISSUE 629

APRIL 2005
PS Magazine - TB 43-PS-629 - Page 12 of 33
PS 629
APR 05
21
M16-Series Rifle, M4/M4A1 Carbine…
Dear Editor,
In my work in Southwest Asia, I've run across armorers ordering
the wrong parts for their M16s or M4s. I don't think they're paying
attention to the UOCs. Can you remind them?
Editor's note:
Of course. UOC stands for
"usable on code"
and is
listed in the parts TM in the description column for each item. It's
important to pay attention to the UOC because otherwise you could
end up with an M16A4 barrel assembly
for an M16A2.
PS 629
APR 05
20
M2 Machine Gun…
Dear Half-Mast,
PMCS Item 15 on Page 0010
00-27 in the M2 machine gun's
TM 9-1005-213-23&P says that if
the upper part of the slot for the M10
manual charger is worn, the M2 is not
mission capable. We see lots of M2s
that have slight wear in this area, so
technically they should be classed
NMC. But we think they are still good
for battle. Can you give us a more
precise criteria than
"worn"
?
D.S.
Dear D.S.,
Sure. As long as the bolt stud
that travels the slot doesn't have
more than a slight up-or-down
or side-to-side movement, it's
OK for the upper part of the slot
to be slightly worn. But if the
bolt is so loose in the slot that
you think it will cause the M2
to malfunction,
turn in the gun.
Bolt stud
have more
than slight
movement?
Iv’e still
got a lot of
firing in me!!
half-mast!
y’gotta tell
him!
let’s see if we
can make the pmcs
criteria
clearer.
he’s
right.
Remember, for M16/M16A1 parts
look in TM 9-1005-249-23&P and for
the M16A2/A3/A4 and M4/M4A1 ver-
sions look in TM 9-1005-319-23&P.
I don’t
know
where
your
head is.
that’s for an m4A1 and
I’m
an m4. you didn’t
check the uoc, did you?
Bill Schwarz
LOGSA contractor
Redstone Arsenal, AL
You—
Yes, You
—WAtCH UOC
Here are
all the
UOCs for
the M16s
and
M4/M4A1s…
M16 AR7
M16A1 AR6
M16A2 AR8
M16A3 AW4
M16A4 AZ1
M4 AS1
M4A1 AY6
hey, wait a
minute! my bolt
stud slot is
barely worn!
Handguard assembly
(M16A2)
UOC: AR8
Handguard, assembly
(M4, M4A1)
UOC: AS1, AY6
Tube, bent, metallic
(M16A2, M16A3, M16A4)
UOC: AR8, AW4, AZ1
Tube, bent, metallic
(M4, M4A1)
UOC: AS1, AY6
Barrel, assembly
(M16A2, M16A3)
UOC: AR8, AW4
Barrel, assembly
(M16A4)
UOC: AZ1
Check
UOC
before
ordering
parts
629.20-21(C)
2/25/05
1:33 PM
Page 1
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