The Heckler & Koch G3KA4 is a germany-made select-fire carbine chambered in 7.62x51mm NATO, introduced in 1974. Primary use: military. Type: Carbine Action: Select-Fire Caliber: 7.62x51mm NATO Capacity: 20 Year introduced: 1974, Germany Weight: 192 oz Overall length: 40.2" Status: Discontinued Intended use: military