General-purpose machine gun
A general-purpose machine gun (GPMG) is an air-cooled, usually belt-fed machine gun that can be adapted flexibly to various tactical roles for light and medium machine guns. A GPMG typically features a quick-change barrel design calibered for various fully powered cartridges such as the 7.62×51mm NATO, 7.62×54mmR, 7.5×54mm French, 7.5×55mm Swiss and 7.92×57mm Mauser, and be configured for mounting to different stabilizing platforms from bipods and tripods to vehicles, aircraft, boats and fortifications, usually as an infantry support weapon or squad automatic weapon.
The MG-42 type general-purpose machine guns in both bipod and tripod configurations. The tall tripod on the right is for anti-aircraft use.
MG 34 belt-fed tripod version (top) and saddle-drum magazine bipod version (below)
MG 42/59
MG3
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.
An M60 machine gun belt loaded with 7.62×51mm NATO cartridges, aboard a U.S. Navy patrol craft
8mm Lebel feed strip on an M1914 Hotchkiss gun.
An M27 disintegrating belt loaded with 5.56×45mm NATO M855 Ball and M856 tracer ammunition being fed into an M249 light machine gun
Method of joining German non-disintegrating metallic-link ammunition machine gun belts