The TriStar Viper series is a semi-automatic gas operated shotgun that is reliable functional and hard working. Its removable choke system uses Beretta/Benelli Mobil threads includes three choke tubes (IC M F) choke box and wrench. The Viper also features manual E-Z load mag cut-off vent ribbed barrel with matted sight plane & fiber optic front sight and chrome-plated chamber. A shot plug is included. This 20 gauge G2 youth model has a 26″ barrel stock and forearm constructed of a synthetic with a rubber recoil pad and a shim kit.