The 870 Marine Magnum applies a full-coverage nickel/chrome electroless plating to every metal surface, making it the most corrosion-resistant production pump shotgun available. Designed for maritime, marine, and coastal use. Synthetic stock resists moisture and salt spray. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 7 Year introduced: 1992, USA Weight: 208 oz Overall length: 38.5" Status: Active Military use: Yes Intended use: Maritime, Law Enforcement, Home Defense, Tactical