PS Magazine - TB 43-PS-743

PS, The Preventative Maintenance Monthly

ISSUE 743

OCTOBER 2014
PS Magazine - TB 43-PS-743 - Page 23 of 33
42
PS 743
OCT 14
Dear Half-Mast,
We just got the close combat mission capability kit (CCMCK) gage,
NSN 5220-99-776-0695, for the M16 rifle/M4 carbine CCMCK kits.
This gage measures firing pin protrusion. Is TMDE supposed to calibrate
this gage? We can’t find any information on this.
Mr. P.R.
Dear Sir,
There’s really no way to calibrate the CCMCK fring pin protrusion gage, so
the answer is no. Because these are low-powered training rounds, misfres due to
out-oF-spec fring pin protrusion shouldn’t be a saFety problem. Just make sure to
clear and clean the weapon aFter fring CCMCK rounds. As long as there are no
noticeable misfres From a CCMCK bolt, the fring pin protrusion is OK and the
gage is doing its job.
The same is true For the M249 gage, NSN 5220-99-
232-8749.
Don’t use a new M16/M4 barrel that has fred Fewer
than 200 standard rounds For CCMCK. Older barrels are
less likely to have problems with a stuck CCMCK round.
AFter training with CCMCK, it’s a good idea to check
M16s and M4s with the barrel straightness gage. See
WP 0015-24 in TM 9-1005-319-23&P.
±or the complete word on CCMCK, see TM 9-6920-
3700-10. It’s on the LOGSA ETM website:
Gage
barrel
after
firing
CCMCK
rounds
Neither M16/M4 nor M249
gages need calibrating
M16/M4
M249
Small Arms…
MWO Changes M240L BFA
The M24 blank firing
attachment (BFA), NSN 1005-
01-480-0289, is used for
all
versions of the M240.
But MWO 9-1005-
313-50-4 creates
an
exception
for
the M240L.
The MWO changes the M240L’s
standard barrel to a short
one. That means the M240L can
no longer
use the M24 BFA.
instead, you must
use the M2
6
BFA, NSN
the modified M240L.
it’s
easy
to tell
the BFAs apart:
The M24 is
red
and…
…the M26
is
yellow.
if you have
questions
about CCMCK, contact
ARDEC’s Edward Gilligan
at DSN 880-4992,
(9
7
3)
7
24-4992, or email:
edward.gilligan2.civ@mail.mil
That CCMCK
gage is over a
year old. Don’t
you need to get
it
calibrated?
No. As long
as you don’t
have misfires,
the gage is
good.
743 42-43.indd
1-2
9/3/14
10:35 AM
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