PS Magazine - TB 43-PS-565
PS, The Preventative Maintenance Monthly
ISSUE 565
DECEMBER 1999
PS 565
39
DEC 99
PS 565
38
DEC 99
o matter how well you’ve taken care
of the rest of your M16 rifle or M4
carbine, you won’t be hitting much if
you haven’t also taken care of the
sights.
One quick check tells you if your
rear sight is out of adjustment. Turn
the elevation knob down (DN) to the
8/3 mark (6/3 for the M4). If it turns
down another full click past 8/3 (or
6/3 for the M4), it’s out of adjustment.
Tell your armorer.
M16-Series Rifle, M4-Series Carbine . . .
With the receiver still upside down,
move the elevation knob back and forth
several times. Return the elevation knob
to its original position.
Wipe off any excess lube from the
sights. It will just collect dirt.
If the sights are still hard to adjust,
tell your armorer. He needs to have
support take them apart and clean them.
When you zero the rifle, use both
the front and rear sights. If you use
only the elevation knob, you won’t be
able to adjust for ranges longer than
300 meters.
Remember, the M16A2 and M4
aren’t zeroed the same. The M16A2
elevation knob is set one click up from
8/3 for zeroing,while the M4 elevation
knob is set at 6/3. The 25-meter target
for M4 zeroing is on the
back
of the
M16 target, NSN 6920-01-395 2949.
Make sure you’re using the right target
or your shooting will be way off.
Lube bottom of elevation screw shaft
the elevation knob clockwise as far
as it will go to work all the lube in.
Return the windage knob to its origi-
nal position.
Remove the charging handle and turn
the upper receiver upside down. Put a
few drops of lube on the bottom of the
elevation screw shaft and detent spring
hole.
Squirt two drops of lube on the rear
sight’s moving parts. Rotate the wind-
age knob clockwise five clicks and
Give detent two drops of CLP
Depress the front sight detent and
give it two drops of CLP (or other ap-
proved lube like LAW or LSA). Work
the detent up and down until it moves
smoothly.
both the rear and front sights. Get into
all the crevices.
Clean sights with toothbrush
now, let's
check
your
sight
.
no problem!
i'm in
tip-top
shape
! let's see.
..
i-r-e-o-
uh
-q-
t-is that
an l?
Rotate elevation knob all
the way to work in lube
When you clean your rifle, clean the
sights. Otherwise, dirt and rust cause
them to bind. Use a toothbrush to clean
Knob turns past 8/3? Tell your armorer
PS 565
38
DEC 99
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