Machine Gun 7.62mm M60 Operation and Cycle of Functioning 1960 US Army Training Film TF9-2971 The M60 (formally named United States Machine Gun, Caliber 7.62 mm, M60) is a family of American general-purpose machine guns firing 7.62×51mm NATO cartridges from a disintegrating belt of M13 links. There are several types of live ammunition approved for …