The M3 Convertible is Benelli unique dual-mode shotgun that operates as either an inertia semi-auto or a pump-action via a selector ring on the magazine tube. The pump mode ensures function with non-standard or reduced-load ammunition. Type: Shotgun Action: Semi-Automatic Caliber: 12 Gauge Capacity: 5 Year introduced: 1989, Italy Weight: 81 oz Overall length: 41" Status: Active Military use: Yes Intended use: Tactical, Law Enforcement, Military