The Tristar Viper G2 is a gas operated, semi-automatic shotgun that allows you to shoot light target loads to heavy waterfowl loads. Removable choke system that uses Beretta/Benelli Mobil threads, includes three choke tubes (IC, M, F), choke box and choke wrench. Rubber recoil pad, backed with a five-year mechanical warranty and comes shim kits standard. FeaturesManual E-Z Load Magazine Cut-OffVent Rib w/ Matted Sight PlaneFiber Optic SightQuick Shot Plug RemovalChrome-lined Chamber and BarrelSwivel StudsShim kits standard