Product Number: 50771 Standing above the standard, the Mossberg Model 590-A1 is a military grade variant of this famous shotgun. It features an aluminum trigger guard and safety, and a heavier barrel than standard 500 & 590 series shotguns, and is intended for military use under extreme conditions and rough handling The metal trigger guard was added in response to the 3443G materials requirements, and the heavy barrel was added at the request of the US Navy. The 590A1 is generally sold through military and law enforcement channels within the USA, but suffers no restrictions inside Canada. Features & Specifications Dual extractors, positive steel to steel lockup, twin action bars, and an anti-jam elevator ensure smooth operation Top mounted safety provides for ambidextrous operation Picatinny Rail Ontario M9 Bayonet and Scabbard MilSpec Construction 3443E Heavy-Walled Barrel Metal Trigger Guard & Safety Specifications Caliber: 12 Gauge Chamber Size: 3\