Figure 13-54.--MK 19 MOD 3 40-mm machine gun.
Figure 13-55.--MK 64 mount/cradle and M3 tripod.
6. Depress the trigger. The firing pin should
release.
DATA
If necessary, repeat the procedure until the firing pin
releases with the FIRE gauge installed.
Weight . . . . . . . . . . . 75.6 pounds;crew
transportable
Early Timing Adjustment.-- If the timing of the gun
is early, the firing pin will release with the NO-FIRE
Length . . . . . . . . . . . 43.1 inches
gauge installed. The adjustment procedures for this
Width . . . . . . . . . . . . l3.4inches
situation are the same as those described above.
However, turn the trigger bar adjusting nut one notch to
Height . . . . . . . . . . . 8.8 inches
the left. Reinstall the NO-FIRE gauge and depress the
trigger. The firing pin should not release. Repeat the
Rate of Fire (Cyclic) . . . . 325 to 375 rounds
procedure as necessary.
per minute
The importance of obtaining the correct headspace
Range:
and timing adjustments on the .50-caliber BMG cannot
Effective Point Target . . . 1500 meters
be stressed enough. The U.S. Army field Manual
(FM23-65) and appropriate MRCs for the weapon
Effective Area Targets . . . 2212 meters
describe the required procedures in detail. Consult those
references to make these adjustments. Do them carefully
and deliberately.
MK 64 MOUNT
MK 19 MOD 3 40-MM MACHINE GUN
Weight . . . . . . . . . . . 2l pounds
This section is intended to finish you with basic
Length . . . . . . . . . . . 17.5 inches
information about the MK 19 machine gun. The MK 19
Height . . . . . . . . . . . 9.5 inches
will become part of the TOA in the near future.
Information on safety, operation, and maintenance is
available in TM 9-1010-230-10.
MK 64 MOUNT and M3 TRIPOD
The MK 19 MOD 3 (fig. 13-54) is a machine gun
that fires a 40-mm grenade with antipersonnel frag-
mentation and light anti-armor capability. It fires 40-mm
The MK 64 mount/cradle attaches to the M3 tripod
grenades at the rate of 325 to 375 rounds per minute.
(fig. 13-55) and a variety of vehicle mounts. The MK 64
The MK 19 MOD 3 is an air-cooled, belt-fed, blowback-
holds the gun and allows it to traverse and elevate on the
vehicle or tripod. It also features a travel lock that holds
operated, fully automatic weapon. Because it fires from
the weapon in travel position during vehicle operation.
an open bolt, the MK 19 MOD 3 does not "cook off."
13-31