The TriStar Viper Series Semi-Automatic Gas Operated Shotguns are reliable, functional and hard working. It has a 3″ gas operated, semi-automatic action that allow you to shoot light target loads to heavy waterfowl loads interchangeably. Removable choke system uses Beretta/Benelli Mobil Threads, includes three choke tubes (IC, M, F), choke box, and wrench. High-grade Turkish walnut with cut checkering and semi-gloss finish. Rubber Recoil pad.