Description
Mossberg has been building dependable pump guns for over six decades, and the 590R is where that track record meets modern ergonomics. The headline feature is the ambidextrous rotary safety selector, an AR-style thumb safety that replaces the classic tang slide. If you spend most of your range time behind a carbine, your thumb already knows where this safety lives, and it works the same whether the stock is collapsed or fully extended. Mossberg paired it with a flat profile trigger that breaks cleaner and travels shorter than what you'll find on a standard 590, which is a nice touch on a working shotgun.
Built Around the Proven 590 Action
Underneath the new furniture, this is still the 590 that earned its reputation: dual extractors, twin action bars, positive steel-to-steel lockup, and an anti-jam elevator running through an aircraft-grade aluminum receiver. The 18.5-inch heavy-walled barrel wears an integrated one-piece heat shield with a phosphate finish, and the 3-inch chamber handles everything from light target loads to full-power buck and slugs. Capacity is 6+1 in the tube, and the enlarged, beveled loading port with an exposed follower makes topping off quicker and easier on the thumbs.
Fit and Sighting on the 590R
The 5-position adjustable stock with an interchangeable recoil pad and Magpul MOE pistol grip lets this gun fit just about anyone in the household, with a length of pull that runs from 12 to 15.25 inches. Up top, Magpul MBUS 3 flip-up sights ride a full-length Picatinny rail, and they're set at a height that co-witnesses with most red dots if you decide to add glass later. Two QD sling ports round out the package. At 7.1 pounds and just over 36 inches overall with the stock collapsed, the 590R handles well in tight spaces without giving up the sight radius and pattern performance of a proper 18.5-inch barrel. A cylinder bore Accu-Choke tube comes installed, so the choke system is there if you want to tighten patterns down the road.
Key Specifications
- Model: 590R
- Manufacturer Part Number: 50762
- UPC: 015813507622
- Gauge: 12 Gauge, 3" Chamber
- Action: Pump Action
- Barrel Length: 18.5" with Integrated Heat Shield
- Barrel Finish: Phosphate
- Capacity: 6+1
- Choke: Accu-Choke System, Cylinder Bore Tube Installed
- Sights: Magpul MBUS 3 Adjustable Flip-Up Sights
- Optics Mounting: Top Picatinny Rail
- Safety: Ambidextrous Rotary Safety Selector
- Trigger: Flat Profile Trigger
- Stock: 5-Position Adjustable with Magpul MOE Pistol Grip
- Length of Pull: 12" – 15.25"
- Weight: 7.1 lbs
What’s Included
- Mossberg 590R 12 Gauge Pump Action Shotgun
- Cylinder Bore Accu-Choke Tube (Installed)
- Owner's Manual
Frequently Asked Questions
How is the Mossberg 590R different from a standard 590?
The biggest change is the ambidextrous AR-style rotary safety selector, which replaces the traditional tang safety and stays usable no matter how the adjustable stock is set. The 590R also adds a flat profile trigger with a shorter, cleaner break, an integrated one-piece heat shield on the barrel, an enlarged beveled loading port, and Magpul furniture with a 5-position stock. The core action underneath is the same proven 590 design with dual extractors and twin action bars.
Can I mount a red dot on the 590R?
Yes, the receiver wears a full-length Picatinny rail on top, so most micro red dots mount right up. The included Magpul MBUS 3 flip-up sights sit at a height that co-witnesses with common red dot optics, so you keep a backup sighting option if the battery dies. No gunsmithing or drilling required.
Does the Mossberg 590R use detachable magazines?
No, this version (model 50762) feeds from a traditional 6+1 tube magazine under the barrel. If you want the detachable box magazine setup, Mossberg offers that as the 590RM, which is a separate model. The tube-fed 590R keeps the slimmer profile and lets you top off rounds one at a time through the enlarged loading port.
What ammo can the 590R handle?
The 3-inch chamber accepts both 2.75-inch and 3-inch 12 gauge shells, so birdshot, buckshot, and slugs are all on the table. The cylinder bore choke tube that comes installed is well suited to buckshot and slugs at defensive distances. Since it uses Mossberg's Accu-Choke system, you can swap in tighter chokes if you want to stretch it out for other uses.




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