The Mossberg 930 is a gas-operated semi-automatic shotgun positioned as the affordable domestic alternative to premium inertia guns. The field configuration ships with a ventilated rib barrel and is chambered for 3-inch shells, handling 2.75 through 3-inch loads via its self-regulating gas system. Type: Shotgun Action: Semi-Automatic Caliber: 12 Gauge Capacity: 4 Year introduced: 2005, USA Weight: 232 oz Overall length: 48" Status: Active Intended use: Hunting, Waterfowl, Sport