TriStars Viper Max is a gas operated semiautomatic shotgun that allows you to shoot light target loads to heavy waterfowl loads utilizing a two piston system. The two piston system uses a light load for 2 34 shells and the secondary piston can be stored in the forearm for easy retrieval. The chromelined barrel has a vent rib with a matted sight plane and a fiber optic sight. The barrel also has four Beretta Optima Plus Chokes SK IC M F. The stock and forearm are constructed of a synthetic and over molded rubber grips. This 12 gauge has a 26 barrel with an overall Realtree MAX5 camo finish."