The Beretta A400 Xplor Unico is a unique multi-gauge system that uses a single 12 gauge receiver with interchangeable gauge-specific barrels. One gun can cycle 12, 20, and 28 gauge shells by swapping barrel and magazine tube assemblies, a groundbreaking system for versatile hunters. Type: Semi-Auto Shotgun Action: Gas-Operated Caliber: 12 Gauge Capacity: 4 Year introduced: 2011, Italy Weight: 6.8 oz Overall length: 49.2" Status: Discontinued Intended use: Field, Hunting, Sporting Clays