The Winchester Super X3 was the third generation of the Super X gas-operated platform, introducing the Active Valve self-adjusting gas system and Inflex Technology recoil pad. The SX3 established the reliability and versatility standards that the SX4 built upon. Type: Semi-Auto Shotgun Action: Gas-Operated Caliber: 12 Gauge Capacity: 4 Year introduced: 2008, Belgium/Japan Weight: 6.5 oz Overall length: 48" Status: Discontinued Intended use: Field, Hunting, Sporting Clays