PS Magazine - TB 43-PS-632
PS, The Preventative Maintenance Monthly
ISSUE 632
JULY 2005
PS 632
JUL 05
17
Should M68 Block Sight Post?
Dear Half-Mast,
We are installing
M68 reflex sights
on our M16 rifles
and have a problem
with the M68
blocking part of the
front sight post. Is
there a spacer or
something similar we
could install that
would take care of
this?
CPT J.P.
Dear Captain J.P.,
There is no fix for this problem because it isn't
really a problem.
If you're using the front sight post
to align the M68, first zero the M16 or M4/M4A1
like it says in the M16's TM 9-1005-319-10.
Then
go to the alignment procedure that begins on WP
0005 00-10 in the M68's TM 9-1240-413-12&P.
To
align the M68 you need to see only the top of the
front sight post, not the whole post.
Once you've done the rough alignment using the
front sight post, you will use the red dot for sighting,
not the sight post.
M16-Series Rifle, M4/M4A1 Carbine…
Be Clear on
Correct Clearing
S
ome units think the best way to
check on the range for an unfired
round in their M16 rifles or M4/M4A1
carbines is to jam a cleaning rod all the
way down the barrel.
The problem with that method is
that the rod can damage the bolt face.
That leaves you with a weapon that
may not fire and a ruined bolt.
"Rodding" a weapon is not neces-
sary.
It doesn't take that much longer
to correctly clear your M16 or
M4/M4A1 like this:
oh,
no!
with me you
don’t need
the
front sight. just
use my
red dot!
1.
Point the weapon in a safe direc-
tion, cock it and put it on SAFE. Won’t
go on SAFE? Proceed with
caution!
3.
Pull the charging handle back. Press
the bottom of the bolt catch and let
the bolt move forward until the bolt
catch engages it. Push the charging
handle to its forward position.
5.
With the weapon still on SAFE, press
the upper part of the bolt catch so that
the bolt goes to the forward position.
You're done.
2.
Remove the magazine.
4.
Check the receiver and chamber for
unfired rounds or brass.
you just
ruined
my bolt!!
y’gotta
lock the
bolt back
and look
in the
chamber.
oww!
that’s
not
the way
to check for
a round!
how will
I
hit
any-
thing?
I can’t see
all of the front
sight post!
632.16-17(C!)
5/31/05
3:27 PM
Page 1
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