The Mossberg 590A1 in the compact 18.5-inch configuration. Military-spec construction including heavy barrel, parkerized finish, metal trigger guard, and metal safety. 5+1 capacity. Popular with law enforcement and home defenders who want proven durability. Type: Pump Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 6 Year introduced: 1990, USA Weight: 7 oz Overall length: 38.5" Status: Active Military use: Yes Intended use: Military, Tactical, Law Enforcement, Home Defense