The HK91 is the semi-automatic civilian export version of the G3 battle rifle, one of the most prolific delayed-blowback roller-locked designs ever produced. The 17.7-inch barrel delivers full 7.62x51mm performance from the fluted chamber and polygonal bore characteristic of all HK roller-locked designs. Imported to the US through the mid-1980s before import restrictions ended new production importation. Now a significant collector piece. Type: Rifle Action: Semi-Automatic Caliber: 7.62x51mm Capacity: 20 Year introduced: 1974, Germany Weight: 193 oz Overall length: 40.2" Status: Discontinued Intended use: collector, sporting, historical