GAU-19/A

The DShK 1938 (Degtyaryova-Shpagina Krupnokaliberny) is a Soviet 12.7×108mm heavy machine gun. It has served as the primary heavy machine gun for Soviet and Russian forces since World War II and is one of the most widely produced heavy machine guns in the world.

The M3 Browning is a high rate of fire variant of the M2 heavy machine gun developed for aircraft use during World War II. It fires the .50 BMG cartridge at approximately 1,200 rounds per minute, nearly double the rate of the standard M2. The weapon uses a lighter bolt assembly and a stronger recoil spring to achieve its increased cyclic rate. It was widely used on American fighter and bomber aircraft during the war.

The CIS 50MG is a Singaporean .50 caliber heavy machine gun developed by Chartered Industries of Singapore, now ST Kinetics. It was designed as a lightweight alternative to the M2HB, using a gas-operated action instead of traditional recoil operation. The weapon can be configured for ground, vehicle, and naval roles. It offers a quick change barrel system for sustained fire operations.