Mossberg 50790 590A1 Pro 12 Gauge 6+1 18.50" Tungsten Gray Cerakote Barrel & Steel Drilled & Tapped Receiver, Black Synthetic Stock

The Mossberg 590A1 Pro is a 12 gauge pump-action shotgun built from the ground up for serious defensive work and tactical applications. This 18.5-inch model pairs a heavy-walled barrel finished in durable Tungsten Gray Cerakote with a steel receiver drilled and tapped for optic mounting—giving you a hard-use platform that's equally at home in professional hands or behind an experienced civilian shooter. The 6+1 capacity and compact 37.75-inch overall length make it maneuverable in tight spaces while the adjustable synthetic stock (12–13-inch length of pull) accommodates different body types and gear configurations.

Built on proven Mossberg pump-action architecture, the 590A1 Pro features heavy-walled construction, dual extractors, and a robust steel-to-steel lockup that's been field-tested in demanding environments. The top-mounted ambidextrous safety and twin action bars—paired with an anti-jam elevator—ensure smooth, reliable cycling under stress. Every control point is reinforced: the metal trigger guard and safety button won't fail when it matters.

The optic-ready receiver ships with metal ghost-ring and front fiber-optic sights mounted low-profile with protective wings. Remove the optics plate and you can mount modern micro-dot sights (RMSc footprint) directly to the receiver, letting you run your preferred red dot or reflex sight. The cylinder-bore choke gives you pattern flexibility for buckshot, slugs, or less-lethal rounds. Cerakote finish is a proven ceramic-polymer coating designed to resist corrosion and rough handling—essential for a gun that earns its paycheck.

Whether you're setting up a patrol gun, home-defense shotgun, or training a new shooter, the 590A1 Pro delivers the controls and durability you'd expect from a purpose-built platform. This is Mossberg's professional-grade pump, and it doesn't cut corners.

Key Features

• Heavy-walled barrel with durable Tungsten Gray Cerakote finish
• Steel receiver drilled and tapped for direct optic mounting
• Optics-ready with factory metal ghost-ring and fiber-optic front sights (RMSc micro-dot compatible)
• Dual extractors and steel-to-steel lockup for reliable cycling
• Top-mounted ambidextrous safety accessible from either shoulder
• Twin action bars and anti-jam elevator
• Adjustable synthetic stock (12–13 inch length of pull) with spacer
• Reinforced metal trigger guard and safety button
• 6+1 round capacity with cylinder-bore choke

Specifications

Frequently Asked Questions

Can I mount a red-dot sight on this shotgun?

Yes. The 590A1 Pro comes with a drilled and tapped steel receiver and factory optics plate. With the plate removed, you can mount RMSc-footprint micro-dots and reflex sights directly to the receiver. It arrives with factory metal ghost-ring and fiber-optic sights in place.

What's the stock length of pull, and is it adjustable?

The synthetic stock offers an adjustable 12–13 inch length of pull, and it comes with a spacer to dial in the fit. This range accommodates different body sizes and heavier clothing worn in cooler seasons.

What ammunition does the 590A1 Pro accept?

The shotgun is chambered in 12 gauge with a 3-inch chamber. It will fire standard 2.75-inch and 3-inch loads. The cylinder-bore choke provides a wide shot pattern suitable for buckshot, slugs, or less-lethal rounds.

Is the safety ambidextrous?

Yes. The 590A1 Pro features a top-mounted ambidextrous safety that can be operated from either the right or left side, making it equally practical for left- and right-handed shooters.