The Viper G2 Pro is a gas operated, semi-automatic shotgun that allows you to shoot light target loads to heavy waterfowl loads utilizing a two piston system. The secondary piston can be stored in forearm for easy retrieval. Featuring manual E-Z load mag cut off; vent rib w/matted sight plane; quick shot plug removable and fiber optic sight. Includes shim kit, shot plug, three Beretta/Benelli Mobil Chokes- Modified, Improved Cylinder, Full Hand Right Hand Gauge 20 Gauge Action semi-auto Safety Crossbolt Series Wood Sights Fiber Optic Front Weight 5.56 lbs Chamber 3" Capacity 5+1 Weight Range 5 lbs to 5.99 lbs Barrel Length 28" Chokes Included F,M,IC Barrel Description Vent Rib Chrome-Lined Metal Finish Group Blued/Black Stock Finish Group Brown Barrel Length Range 28" to 28.99" Choke Configuration MobilChoke Receiver Description Steel