ARGO gas-operated semi-automatic shotgun adopted as the M1014 by the US Marine Corps after rigorous military testing. Self-regulating gas system designed to cycle reliably under extreme conditions without user adjustment. Type: Shotgun Action: Semi-Automatic Caliber: 12 Gauge Capacity: 5 Year introduced: 1998, Italy Weight: 8.4 oz Overall length: 40" Status: Active Military use: Yes Intended use: Military/Law Enforcement