Mossberg 590A1 12 Gauge 18.5″ Threaded 6+1 Black

About this product

The Mossberg 590A1 is a purpose-built, mil-spec pump-action 12 gauge designed for demanding duty and security roles. It features an 18.5″ heavy-walled, threaded barrel with an Accu-Choke Cylinder Bore choke installed and a synthetic black stock with spacer. The receiver is drilled and tapped and supplied optic-ready with a cover plate installed, and the forend accepts M-LOK accessories for practical customization. With a 3″ chamber and a 6+1 capacity, the 590A1 focuses on rugged durability and reliable operation in challenging conditions.

Key Specifications

• The gauge is 12 Gauge.
• The barrel length is 18.5 inches.
• The chamber size is 3 inches.
• The capacity is 6+1.
• The action type is Pump Action.
• The barrel style is Heavy Walled.
• The stock is Black synthetic.
• The finish is Parkerized.
• The sights are Bead front; optic-ready (Shield RMSc footprint).
• The receiver is Drilled & Tapped.

Built to meet military-grade standards, the 590A1 combines reinforced components and practical features — threaded heavy-walled barrel, optic-ready receiver, and M-LOK forend — for dependable service in security, duty, and responsible home defense applications. Its straightforward controls, proven pump-action reliability, and adaptable mounting options make it a solid choice for users who prioritize rugged construction and functional versatility.