Marine-grade corrosion-resistant version of the M4 Tactical with a nickel-plated receiver and phosphate-coated barrel. Built for saltwater environments and extended maritime operations. Type: Shotgun Action: Semi-Automatic Caliber: 12 Gauge Capacity: 5 Year introduced: 2006, Italy Weight: 89.6 oz Overall length: 40" Status: Active Military use: Yes Intended use: Military, Tactical, Law Enforcement