Gas-operated semi-auto in 20 gauge with 28-inch barrel. The 20-gauge 1100 uses a dedicated smaller receiver rather than adapting the 12-gauge frame, resulting in excellent balance and handling characteristics. Type: Shotgun Action: Semi-Automatic Caliber: 20 Gauge Capacity: 4 Year introduced: 1969, USA Weight: 7 oz Overall length: 48" Status: Active Intended use: Clay Target