If your life depends on it, depend on the no-fail reliability of Benelli's M4 Tactical Semiautomatic Shotguns. These U.S.M.C.-approved defense shotguns boast a unique Auto Regulating Gas Operated (ARGO) system that guarantees rapid-fire reliability. Extended magazine and viper-fast semiautomatic put superior firepower at your disposal for maximum downrange effect. Comes standard with a Picatinny rail, standard modified choke tube, fully adjustable ghost-ring rear sight, fixed-blade front sight and synthetic pistol-grip stock. The M4 H20 sports an NP3 finish for weatherproof performance.