The Auto-5 in 20 gauge on a properly scaled receiver. Introduced as the lightest full-size semi-auto shotgun available, it handled 2-3/4-inch 20 gauge loads with the same long-recoil reliability as the 12 gauge. Type: Shotgun Action: Semi-Automatic Caliber: 20 Gauge Capacity: 4 Year introduced: 1958, Belgium Weight: 56 oz Overall length: 46" Status: Discontinued Intended use: Hunting, Collecting