The Tristar Viper Max Shotgun is a 3 A 1/2" gas operated, semi-automatic shotgun that allows you to shoot light target loads to the heaviest waterfowl loads utilizing a two piston system. The Viper Max comes with a light and heavy load piston. Use light load piston for 2 A 3/4" shells, for other rounds use heavy load piston. Secondary piston can be stored in forearm for easy retrieval. The Viper Max comes with 4 Beretta/Benelli Mobil Chokes (SK, IC, M, F) as well as over molded rubber grips on the stock and forearm for added comfort. Newly developed recoil pad and swivel studs also included. Back by Tristar's Five Year Warranty.FeaturesMagazine Cut-off ActionVent Rib w/ Matted Sight PlaneFiber Optic Sight5 Round Magazine - Shot Plug IncludedQuick Shot Plug RemovalChrome-lined Chamber and BarrelSwivel Studs4 Beretta/Benelli Mobil Chokes (SK, IC, M, F)