MIL-M-13529D, MILITARY SPECIFICATION: MOUNT, GUN, RING TYPE, REVOLVING (08 NOV 1985)

MIL-M-13529D, MILITARY SPECIFICATION: MOUNT, GUN, RING TYPE, REVOLVING (08 NOV 1985)., This specification covers revolving ring (revolving ring on fixed ring) machine gun mounts used on military trucks and combat vehicles.