PS Magazine - TB 43-PS-615

PS, The Preventative Maintenance Monthly

ISSUE 615

FEBRUARY 2004
PS Magazine - TB 43-PS-615 - Page 9 of 33
PS 615
FEB 04
14
M16-Series Rifle, M4/M4A1 Carbine,
M203-Series Grenade Launcher…
…and sometimes
it’s hard to tell
what’s what.
Well, here’s how
to tell…
M16 Rifle
M4 Carbine
M16A1
Mode of fire:
semi/auto
Upper receiver:
built-in (integral) carrying handle
without elevation adjustment
Barrel:
1/12 twist, 20 inches long
M4
Mode of fire:
semi/burst
Upper receiver:
flat-top with elevation adjustment and removable carrying handle
Barrel:
1/7 twist, 14.5 inches long
M16A2
Mode of fire:
semi/burst
Upper receiver:
built-in (integral) carrying handle
with elevation adjustment
Barrel:
1/7 twist, 20 inches long
M4A1
Mode of fire:
semi/auto
Upper receiver:
flat-top with elevation adjustment and removable carrying handle
Barrel:
1/7 twist, 14.5 inches long
M16A4
Mode of fire:
semi/burst
Upper receiver:
flat-top
with removable carrying handle
and elevation adjustment
Barrel:
1/7 twist, 20 inches long
turn the
page for
info on the
m203!
Many armorers
may have several
versions of the
M16 rifle, the M4
carbine, and the
M203 grenade
launcher in their
arms room…
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