The Tristar Viper G2 28 gauge is a gas operated, semi-automatic shotgun that allows you to shoot light target loads to heavy waterfowl loads. Removable choke system that uses BerettaA(R)/BenelliA(R) Mobil threads, includes three choke tubes (IC, M, F), choke box and choke wrench. Turkish Walnut stock and forearm with cut checkering and semi-gloss finish. 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 Sight5 Round Magazine - Shot Plug IncludedQuick Shot Plug RemovalChrome-lined Chamber and Barrel3 Beretta/Benelli Mobil style Choke Tubes (IC, M, F)Shim kits standard