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. Many medium machine guns are also considered general-purpose machine guns as they are broadly useful across a variety of infantry roles and can be mounted to a wide range of vehicles, aircraft, or static mounts; however the overlap is not complete, as not all MMGs are GPMGs and not all GPMGs are MMGs.

Source: Wikipedia — General-purpose machine gun (CC BY-SA 4.0)