The TriStar Viper series is a dependable and versatile semi-automatic, gas-operated shotgun built for performance. It features a removable choke system compatible with BerettaA(R)/BenelliA(R) Mobil threads and comes with three choke tubes (IC, M, F), a choke box, and a wrench. Designed for convenience and durability, the Viper includes 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. A shot plug is also included for added versatility.