Mossberg 50756 590R 12 Gauge Pump 3" 6+1 18.50" Flat Dark Earth Cerakote Heat Shield Barrel, Flat Dark Earth Cerakote Steel Receiver, Black AR Mil-Spec Adjustable Synthetic Stock, Black Magpul Grip

The Mossberg 590R is a modern pump-action shotgun built on decades of proven 590 reliability, now reimagined for shooters who want AR-platform ergonomics without sacrificing shotgun performance. This 12 gauge 3" chamber model holds 6+1 rounds and pairs a full-length heat shield barrel with an adjustable synthetic stock and Magpul grip—making it equally at home in a defensive scenario, tactical course, or hunting situation where modularity and quick target engagement matter.

What sets the 590R apart is its AR-style controls: an ambidextrous rotary safety selector, Mil-Spec compatible stock receiver that accepts standard AR adjustable stocks, and a Picatinny rail on top ready for optics. The 18.5" Flat Dark Earth Cerakote barrel integrates a full-length heat shield, so your support hand stays comfortable even after extended shooting. The Flat Dark Earth receiver matches the barrel for a cohesive, professional finish. Traditional 590 internals—dual extractors, twin action bars, positive steel lockup—deliver the smooth, reliable cycling that made the 590 an institution.

The enlarged loading port and exposed follower speed up reloads under pressure. Two QD ports on the stock give you flexible accessory mounting. The five-position adjustable stock and interchangeable recoil pad let you dial in fit for your frame and shooting style. If you're coming from AR rifles or want shotgun controls that feel familiar, the 590R bridges that gap without compromise.

Key Features

• 12 gauge 3" chamber, 6+1 capacity with 18.5" barrel and integrated heat shield
• Ambidextrous AR-style rotary safety selector and Mil-Spec compatible stock receiver
• Flat Dark Earth Cerakote finish on barrel and receiver; black synthetic stock and Magpul grip
• Top Picatinny rail ready for AR-optics mounting
• Five-position adjustable synthetic stock with interchangeable recoil pad
• Two QD ports for sling or accessory attachment
• Enlarged, beveled loading port with exposed follower for fast reloads
• Dual extractors, twin action bars, and anti-jam elevator for reliable operation
• Accu-Choke cyl. bore or breacher choke options

Specifications

Frequently Asked Questions

Can I use standard AR-15 stocks and accessories on the 590R?

Yes. The stock base and adapter are compatible with Mil-Spec AR stocks and accept other grip designs. The receiver includes two QD mounting ports for slings and accessories.

What's the capacity and does it come with a heat shield?

The 590R holds 6+1 rounds in the 3" chamber. The 18.5" barrel includes an integrated, full-length heat shield as part of a single-piece assembly, so your support hand stays protected during rapid fire.

Does this shotgun come with sights or a way to mount optics?

The 590R features a top Picatinny rail optimized for AR-style optics. A separate scope, reflex sight, or other rail-mounted optic can be added. Picatinny rail-mounted iron sights (like MBUS) are compatible but sold separately.

What finish colors are available?

This model features Flat Dark Earth Cerakote on both the barrel and receiver, with a black synthetic stock and black Magpul grip.