A medium machine gun (MMG), in modern terms, usually refers to a belt-fed machine gun firing a full-powered rifle cartridge, and is considered "medium" in weight. Medium machine guns are light enough to be infantry-portable by a single individual. 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.