SECTION II. ARMAMENT
4-2-1. Armament Subsystems
The armament subsystems, (fig. 4-2-1) are the M24, and
M41 machine guns installed in the cabin door, cabin es-
cape hatch, (M24) and on the ramp (M41). The two flex-
ible 7.62 mm machine guns (M60D) (fig. 4-2-2) are free
pointing but limited in traverse, elevation, and depression
by cam surfaces, stops on the pintles, and pintle posts of
the left and right mount assemblies (fig. 4-2-3). Spent
cartridges are collected by an ejection control bag on the
right side of the machine gun, and an ammunition can is
on the left side (fig. 4-2-4).
4-2-2. Machine Gun.
The 7.62 machine gun (M60D) is a link-belt-fed gas-op-
erated air-cooled automatic weapon. Refer to TM
4-2-3. Mount Assemblies (M24).
The mount assemblies (fig. 4-2-5) are installed on
mounting brackets fastened inside the helicopter and
secured with mounting pins.
4-2-4. Machine Gun Controls.
For information on the operation and maintenance of the
M24 and M42 machine gun systems, refer to TM
9-1005-224-10 and 9-1005-262-13.
To prevent injury to personnel, the cock-
ing handle must be returned to the forward
or locked position before firing.
Pressing the trigger to release the bolt ac-
complishes feeding and releasing of the
firing mechanism. Unless firing is in-
tended, make sure the machine gun is
cleared of cartridges before pressing the
To prevent damage to the cartridge tray
when no ammunition is in the machine
gun, retard the forward force of the re-
leased bolt by manually restraining for-
ward movement of the cocking handle.
4-2-5. Mount Assembly Stops, Cams, Quick-Re-
lease Pin, and Shock Cord (M24).
The mount stops, cams, quick-release pin, and shock
cord have the following functions:
Maximum traverse (table 4-2-1) of the machine
gun are controlled by stops on both sides of the cam on
the pintle post.
Maximum elevation and depression are con-
trolled by cam surfaces on the pintle.
The quick-release pin (fig. 4-2-5 is attached by
cable to the mount bracket of the mount and fastens the
mount bracket to the rear bracket at the helicopter open-
The shock cord (fig. 4-2-6) is fastened to the
mount bracket and to the machine gun when stowed.
4-2-6. Operation Armament Subsystem M24.
Operate the ARMAMENT SUBSYSTEM M24 as de-
scribed in the following paragraphs.
4-2-7. Preflight Checks.
The preflight check consists of the following:
1. Machine Gun M60D Check to make sure
that gun is thoroughly cleaned and lubri-
cated, operable, and secured on the pintle
with the quick-release pin (fig. 4-2-9).
2. Ejection control bag (fig. 4-2-7) Installed
and securely latched.
3. Ammunition can (fig. 4-2-8) Installed on
machine gun and loaded.
4. Safety Push button to safe (S) position,
aim at clear area, and try to fire the un-
loaded machine gun.
5. Mount Secured and checked for free
6. Extra ammunition boxes Properly
4-2-8. Before Takeoff Check.
1. Check the weapon safety is on (S) posi-
2. Inspect the chamber to be sure it is clear.
3. Close the cover and secure the machine
gun in stowed position.