The Mossberg 590A1 Special Purpose Military configuration as issued to U.S. armed forces. Parkerized finish, SpeedFeed stock with built-in shell storage, heat shield, bayonet lug, and ghost ring sights. Meets all MIL-SPEC 3443E requirements. Type: Pump Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 6 Year introduced: 2000, USA Weight: 7.5 oz Overall length: 38.5" Status: Active Military use: Yes Intended use: Military, Tactical, Law Enforcement