PS Magazine - TB 43-PS-600
PS, The Preventative Maintenance Monthly
ISSUE 600
NOVEMBER 2002
PS 600
NOV 02
50
M240 Machine Gun…
Don't
Blank Out
with Blanks
Half-Mast,
We’re having
trouble
with blanks
jamming our
M240s.
Yeah, and the bfa
NSN listed in TM
9-1005-313-23&P is
different than the
one listed in the -10.
Can you help?
First, you don't need a
discriminator. That was
used with an earlier
bfa and is not needed
for the m24 bfa,…
There is
some
very
old
blank
7.62 ammo in
the field that
doesn't
fire
well.
It has a flat forward end
and a paper wad sealer.
The best blank ammo to use
looks like a normal bullet
and has a metal star crimp.
Of course, you
must remember
blank ammo
produces
much
more carbon
than real ammo.
Other things to consider
while doing PMCS include…
So the m240 needs a much
more thorough cleaning and
lubing after firing blanks or
you will have firing problems
next time you go to the range.
Is the bfa
chamber device
bent, cracked,
or
corroded?
Is it seated
correctly over
the flash hider?
Are the barrels being changed
during firing? Barrels should
be switched every 10 minutes
during sustained fire (100
rounds per minute) and every
2 minutes during rapid fire
(200 rounds per minute).
Is the gas regulator set to 1?
Are there
chips or
gouges
across the
feed tray
that would
cause the
ammo belt
to drag?
New versions of
both the -10 and
-23&P TMs will hit
the field some-
time in 2002. Make
sure your pubs
account is set up
so that you'll
receive them
automatically.
I need
a really
good
cleaning
now!
firing
blanks is
a
dirty
business.
I’m ready to take
over. wonder if this guy knows
we’re s’posed to be swapped?
1
…whose NSN is
listed on Page C-
20-1 of the -23&P
(Jun 97 with Ch 2).
The m24
bfa's parts
can be found
there, too.
Are the feed
pawls worn or
are their springs
weak? is the
m240 feeding
properly?
We were told part
of the problem may be that we
don't have a part of the blank
firing attachment (bfa) called
the discriminator.
Part of your
problem may be
the
blank ammo
you're using.
600. 50-51 (C)
9/27/02
11:21 AM
Page 1
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