The Benelli M2 Tactical, like all Benelli semiautomatic shotguns is Inertia Driven, which uses recoil energy to cycle the action. This eliminates all the problems associated with gas-operated systems, such as the necessity of frequent cleaning and the tendency gas-operated systems have for malfunctioning during adverse weather conditions. The M2 Tactical fires all 1 oz. or heavier 2¾" and 3" loads. The Benelli M2 Tactical features a fully adjustable ghost-ring aperture rear sight and military-style fixed-blade front sight.