The Benelli M4 was developed specifically for the U.S. military, winning the Joint Service Shotgun competition in 1998 and adopted as the M1014 by the USMC and U.S. Army. It uses Benelli's ARGO (Auto-Regulating Gas-Operated) system rather than the inertia system of other Benelli models, providing reliable cycling with less-than-lethal and reduced-recoil loads that would short-cycle an inertia gun. Type: Shotgun Action: Semi-Automatic Caliber: 12 Gauge Capacity: 7 Year introduced: 1998, Italy Weight: 112 oz Overall length: 40" Status: Active Military use: Yes Intended use: Military, Law Enforcement, Home Defense, Tactical