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.
Specs at a glance
Key attributes
| upc | 015813507998 |
| manufacturer | Mossberg |
| manufacturer part number | 50799 |
| action | Pump Action |
| barrel length | 18.50" |
| caliber/gauge | 12 Gauge |
| capacity | 6 + 1 |
| chokes included | Cylinder |
| sights | Bead Front |