Mossberg 50795 590A1 Pro 6+1 18.50" Tungsten Gray Cerakote Barrel & Steel Drilled & Tapped Receiver, Magpul SGA Synthetic Stock

The Mossberg 590A1 Pro is a 12-gauge pump-action shotgun built for serious duty and defense work. With its 18.5" barrel, 6+1 capacity, and robust steel construction, this platform has earned its reputation in law enforcement and military service—and it brings that same reliability to civilian shooters who demand a proven, no-nonsense defensive shotgun. The tungsten gray Cerakote finish protects against corrosion while the drilled and tapped receiver opens up modern optics mounting, letting you configure the gun for how you actually fight it.

What sets the 590A1 apart is its obsessive attention to durability: heavy-walled barrel, dual extractors, steel-to-steel lockup, twin action bars, and an anti-jam elevator that keeps the gun running when it counts. The top-mounted ambidextrous safety means you can run it from either shoulder without fumbling. Ghost ring iron sights with a front fiber optic come ready to use, but the optic-ready receiver and drilled/tapped surface let you mount modern red dots (RMSc footprint) or other optics directly—no permanent modifications needed.

The Magpul SGA adjustable stock gives you a custom length of pull between 12.25" and 14.25", and the included spacers let you dial it in for your frame. That adjustability matters whether you're shooting in tactical gear, civilian clothes, or alternating shoulders. At 7 lbs, it's handy enough to move quickly but substantial enough to manage recoil. Cylinder bore choke keeps your patterns predictable at close range, exactly what you need in a defensive tool.

This is a shotgun for people who respect the tool and won't tolerate compromise. It runs, it's modular, and it's been tested harder than most firearms ever will be.

Key Features

• Optic-ready, drilled and tapped steel receiver—mount modern red dots or keep factory ghost ring sights
• Metal ghost ring rear sight with front fiber optic and low-profile protective wings
• Tungsten gray Cerakote finish resists corrosion in harsh conditions
• Twin action bars and dual extractors for reliability under stress
• Anti-jam elevator and steel-to-steel lockup—built to run when it matters
• Ambidextrous top-mounted safety operable from either shoulder
• Magpul SGA adjustable synthetic stock with spacers (12.25"–14.25" LOP)
• Heavy-walled barrel and steel trigger guard for durability
• 6+1 capacity (18.5" barrel, 3" chamber)

Specifications

Frequently Asked Questions

Can I mount a red dot sight on this shotgun?

Yes. The receiver is drilled and tapped, and it's optic-ready with RMSc footprint compatibility. You can mount modern micro red dots directly, and the factory ghost ring sights stay in place—you can cowitness or remove them based on your setup.

What's the length of pull, and can it be adjusted?

The Magpul SGA stock is fully adjustable between 12.25" and 14.25" using the included spacers. That range covers most shooter builds and accommodates different clothing layers or tactical gear.

Is this shotgun designed for defense or hunting?

The 590A1 Pro is purpose-built for defensive and duty work. The 18.5" barrel, 6+1 capacity, and rugged construction make it a professional-grade platform. The cylinder bore choke and short barrel are optimized for close-range engagement, not waterfowl or upland hunting.

What ammunition does it chamber?

This is a 12-gauge with a 3" chamber, so it handles both 2.75" and 3" shells. Stick with appropriate shotgun ammunition for your intended use.