The TriStar Viper series is a reliable and versatile semi-automatic, gas-operated shotgun built for performance. It features a removable choke system with BerettaA(R)/BenelliA(R) Mobil threads and comes with four choke tubes (IC, M, F, SK), a choke box, and a wrench. Additional highlights include a manual E-Z Load mag cut-off, a vent ribbed barrel with a matted sight plane, a fiber optic front sight, and a chrome-plated chamber for enhanced durability. This 16-gauge G2 model is equipped with a 28" barrel and a striking bronze receiver. A shot plug is also included.