MIL-M-13529D (AMENDMENT 1), MILITARY SPECIFICATION: MOUNT, GUN, RING TYPE, REVOLVING (30 JAN 1987)

MIL-M-13529D (AMENDMENT 1), MILITARY SPECIFICATION: MOUNT, GUN, RING TYPE, REVOLVING (30 JAN 1987)., This specification covers revolving ring (revolving ring on fixed ring) machine gun mounts used on military trucks and combat vehicles.