The FN Herstal MAG 7.62 (FN MAG) is a belgium-made full-auto machine gun chambered in 7.62x51mm NATO, introduced in 1958. Primary use: military. Type: Machine Gun Action: Full-Auto Caliber: 7.62x51mm NATO Capacity: 100 Year introduced: 1958, Belgium Weight: 256 oz Overall length: 40.75" Status: Active Intended use: military