PS Magazine - TB 43-PS-564
PS, The Preventative Maintenance Monthly
ISSUE 564
NOVEMBER 1999
PS 564
35
NOV 99
M4A1 Carbine . . .
Seat handle
flush against
notched surface
hank you for your attention. This will take just a couple of
minutes but may save you armorers lots of aggravation with
your M4 carbines.
The carrying handles often disappear because
the handle nuts work loose. To stop that, make
sure the bottom of the handle is flat against the
notched surface of the receiver, with the two
studs centered in the notches. Tighten the nuts
as tight as possible by hand. Tell everyone in
your unit to do that every day when they’re in
the field.
If you still have M16 extractor
springs, which have blue inserts, use
them only in M16s. They’re too weak
for the M4. The stronger M4 extrac-
tor springs, which have black inserts,
can be used in both the M16 and M4.
When you install the spring for ei-
ther extractor, insert the large spring
end and gently twist it clockwise into
place. That seats the spring and keeps
it from coming out.
M4 extractor
has black insert
Tighten nuts by hand
as tight as possible
Insert
Center the studs
in two notches
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