The HK91 is the US civilian semi-automatic version of the G3 battle rifle, imported before the 1989 import ban. It remains one of the most sought-after collector HK rifles. Type: Rifle Action: Semi-Automatic Caliber: 7.62x51mm NATO Capacity: 20 Year introduced: 1974, Germany Weight: 174 oz Overall length: 40.2" Status: Discontinued Intended use: Collecting, Sport