3-1/2 inches gas operated, semi-automatic shotgun that allows you to shoot light target loads to heavy waterfowl loads utilizing a two piston system. The Viper Max comes with a light and heavy load piston. Use light load piston for 2-3/4 inches shells, for other rounds use heavy load piston. Secondary piston can be stored in forearm for easy retrieval. The Viper Max comes with 4 Beretta/Benelli mobil chokes (SK, IC, M, F) as well as over molded rubber grips on the stock and forearm for added comfort. Newly developed recoil pad and swivel studs also included. Back by our 5 years warranty. Features: Magazine cut-off action Vent rib with matted sight plane 5 round magazine shot plug included Quick shot plug removal Chrome-lined chamber and barrel Swivel studs (4) Beretta/Benelli mobil chokes (SK, IC, M, F) Realtree Max-5HD camo pattern Action - gas operated semi-automatic, bolt remains open after last round is fired, if magazine and chamber are both loaded, opening action will result in ejecting shell from chamber and cycling new shell from magazine into the chamber Action - if operator desires to unload the chamber only, press button near trigger guard (magazine cut-off) to lock lifter in place, shell will eject from chamber once opened and bolt will remain open Safety - the primary safety is located on the backside of the trigger guard, when engaged, the safety is designed to block the trigger, hammer lever and the hammer which makes the firing mechanism immobile Magazine - tubular magazine, bottom loading, shot plug included and comes installed, shot plug easily removable by unscrewing the magazine cap, simply pull plug out and replace magazine cap