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 features a two stock combo that comes with a youth stock already assembled on the gun, an adult stock in the box, and a 2″ barrel extension.