The Mossberg 930 Field is a gas-operated semi-automatic 12-gauge with 28-inch vent-rib barrel. Self-regulating gas system handles 2.75 and 3-inch shells without adjustment. Synthetic or walnut stock options. Accu-Choke compatible. Type: Semi-Automatic Shotgun Action: Gas-Operated Caliber: 12 Gauge Capacity: 5 Year introduced: 2005, USA Weight: 7.75 oz Overall length: 48" Status: Active Intended use: Field, Hunting, Sport Shooting