Manuel E-Z load magazine cut-off; Vent rib with matted sight plane; (3) Beretta/Benelli Mobil style chokes (IC, M, F); 5 round magazine shot plug included; Chrome-lined chamber and barrel; Shim kits standard; 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 chamber only, slightly push lifter up and open action, this cuts the magazine off from cycling new shell while unloading the chamber, chamber will remain closed if shells still remain in magazine however; 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