An ammunition belt is a firearm device used to package and feed cartridges, typically for rapid-firing automatic weapons such as machine guns. Belt-fed systems minimize the proportional weight of the ammunition apparatus to the entire weapon system, and allow high rates of continuous fire without needing frequent magazine changes. The capacity of belts and associated belt containers is typically a function of weight and bulk, and their size is limited by caliber and the combined portability of the weapon and ammunition. Typical capacities for man-portable weapon systems range from 50 to 300 rounds of ammunition.

The DShK 1938 is a Soviet heavy machine gun. The weapon may be vehicle mounted or used on a tripod or wheeled carriage as a heavy infantry machine gun. The DShK's name is derived from its original designer, Vasily Degtyaryov, and Georgi Shpagin, who later improved the cartridge feed mechanism. It is sometimes nicknamed Dushka in Russian-speaking countries, from the abbreviation.