PS Magazine - TB 43-PS-633
PS, The Preventative Maintenance Monthly
ISSUE 633
AUGUST 2005
s
ome things just won’t go away–like unlined barrels for the M2 machine gun for
instance. The Army hasn’t bought any unlined barrels in years, but they’re still out
there and still causing problems.
It’s important for armorers to check if
they have unlined barrels because they
wear out 80 percent faster than lined bar-
rels and fire saboted light armor penetrator
(SLAP) ammo very inaccurately.
The easiest way to tell if a barrel is
unlined is to check the part number on the
outside of the barrel. A lined barrel has a
part number of 7266131. Any other num-
ber means the barrel is unlined.
It’s
NOT
OK to use unlined barrels for training! And never use an unlined barrel
with M903 or M962 SLAP ammo. Besides wearing out the barrel quickly, SLAP
ammo also causes jamming. Turn in all unlined barrels.
Order a lined barrel with NSN 1005-00-726-6131.
Check here for part number
PS 633
AUG 05
25
M249 Machine Gun…
Keeping Your Gun in a Sling
Dear Editor,
The M249 machine gun has an aluminum eyelet for the carrying sling to
connect to on the buttstock. But the sling hook is steel, which we've
found can sometimes break the weaker eyelet. Then you have nothing to
connect the sling to.
We have two solutions to that problem:
•
Connect the hook to the eyelet
with a piece of 550 cord or some-
thing similar. If something breaks it
will be the cord, not the eyelet.
PFC Jason Lebrun
B Co, 10th FSB
Ft Drum, NY
PS 633
AUG 05
24
M2 Machine Gun…
Crikey!
I didn’t think there
were any
more
of
these unlined barrels
running around
loose!
•
Wrap duct tape around the hook
where it connects to the eyelet. The
tape cushions the hook and keeps it
from wearing out the eyelet.
Editor's note:
Good ideas to hook onto! Thanks,
Private. A new buttstock is coming that has a replace-
able eyelet, so this problem will eventually disappear
Connect sling hook to eyelet with 550 cord
Wrap tape here
there goes
my sling eye-
let
again!
oops!
that sling
hook is
rough
on
eyelets!
let’s see
if these two
suggestions
help.
Line Out Unlined Barrels
633.24-25(C).qxd
6/30/05
10:22 AM
Page 1
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