The TriStar Viper series is a semi-automatic, gas operated shotgun that is reliable, functional and hard working. Its removable choke system uses 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 Turkey model features a Digital Bottomlands metal finish.