The Remington Model 1100 in 12 gauge with 28-inch barrel is the best-selling semi-auto shotgun in American history. Its gas-operated system significantly reduces felt recoil compared to competitors, making it popular for sustained shooting in competition and field use. Type: Semi-Auto Shotgun Action: Gas-Operated Caliber: 12 Gauge Capacity: 4 Year introduced: 1963, USA Weight: 7.5 oz Overall length: 48" Status: Active Intended use: Field, Hunting, Sporting Clays