The Heckler & Koch HK33E is a germany-made select-fire rifle chambered in 5.56x45mm NATO, introduced in 1968. Primary use: military. Type: Rifle Action: Select-Fire Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 1968, Germany Weight: 192 oz Overall length: 37" Status: Discontinued Intended use: military