Mossberg198466117
Mossberg 590R Stand Off Shotgun 12ga 6rd Capacity 18.5" Breacher Barrel AR Mil-Spec Stock$779.21
Availability: In Stock
The Mossberg 590RM Mag Feed Stand-Off Shotgun brings modern, modular design to pump-action shotgun performance. Built on Mossberg's reputation for rugged reliability, the 590RM ditches traditional tube magazines for a double-stack, magazine-fed system that delivers more rounds per unit length—a genuine advantage for tactical and home-defense shooters who demand capacity without sacrificing maneuverability. With its 18.5" barrel, integrated heat shield, and AR-platform ergonomics, this 12-gauge stands ready for serious work.
What sets the 590RM apart is its thoughtful operator-focused design. The AR-style rotary safety selector is ambidextrous, the compact forend reduces hand fatigue during extended shooting, and the 5-position adjustable stock with MOE+ pistol grip lets you dial in your fit. The top Picatinny rail is optimized for AR optics, so your favorite red dot or low-power variable scope mounts naturally. A flat-profile trigger with a crisp, predictable break rounds out the controls. Standard pump-action guts—dual extractors, steel-to-steel lockup, and twin action bars—deliver the reliability you expect from Mossberg's proven platform.
The 590RM ships with Mossberg's proprietary stabilizing-rib magazines; the base model includes one 10-round magazine (10+1 in the chamber). Aftermarket magazines are available in 5, 10, 15, and 20-round capacities, so you can configure loadouts for different missions. Accu-Choke compatibility lets you swap chokes to match your ammunition and intent. Whether you're running a defensive setup, running a course, or setting up for hunting, the 590RM adapts without compromise.
This is a shotgun built for shooters who think tactically but demand proven function—no gimmicks, just smart engineering and battle-tested durability.
| Gauge | 12 |
| Chamber | 2.75" |
| Capacity | 10 rounds (plus 1 in chamber) |
| Barrel Length | 18.5" with integrated heat shield |
| Barrel Finish | Matte |
| Safety | AR-style ambidextrous rotary selector |
| Stock | 5-position adjustable with interchangeable pad |
| Grip | MOE+ pistol grip |
| Forend | Compact design |
| Sights | Top Picatinny rail (MBUS sights optional) |
| Chokes | Accu-Choke (Cyl. Bore or Breacher) |
| Action | Pump action with dual extractors and twin action bars |
The 590RM uses Mossberg's first double-stack magazine design for pump-actions. This delivers more ammunition capacity in a shorter overall length compared to traditional tube magazines, making it ideal for shooters prioritizing both ammo count and a maneuverable profile. Magazines are available in 5, 10, 15, and 20-round options.
Yes. The 590RM stock base is compatible with Mil-Spec AR-style stocks, and it features the adjustable MOE+ pistol grip. The top Picatinny rail is optimized for AR optics, and the QD mounting ports support quick-detach sling systems. The rotary safety selector is AR-style and ambidextrous, so AR shooters will feel at home immediately.
The 590RM chambers 2.75" 12-gauge shells and ships with one 10-round magazine. It is Accu-Choke compatible, allowing you to swap chokes to match your ammunition type and application (Cyl. Bore or Breacher options are noted).
Yes. The 18.5" barrel, magazine-fed capacity, AR-platform ergonomics, and modular stock system make the 590RM well-suited for both roles. The integrated heat shield provides stand-off distance and helps manage recoil signature, and the Picatinny rail accommodates optics for faster target acquisition. Mossberg's proven pump-action reliability underpins it all.
SKU: 198466109 • Width: 9in • Height: 3.5in • Depth: 46.5in • Weight: 10.4oz
Availability: In Stock
The Mossberg 590RM Mag Feed Stand-Off Shotgun brings modern, modular design to pump-action shotgun performance. Built on Mossberg's reputation for rugged reliability, the 590RM ditches traditional tube magazines for a double-stack, magazine-fed system that delivers more rounds per unit length—a genuine advantage for tactical and home-defense shooters who demand capacity without sacrificing maneuverability. With its 18.5" barrel, integrated heat shield, and AR-platform ergonomics, this 12-gauge stands ready for serious work.
What sets the 590RM apart is its thoughtful operator-focused design. The AR-style rotary safety selector is ambidextrous, the compact forend reduces hand fatigue during extended shooting, and the 5-position adjustable stock with MOE+ pistol grip lets you dial in your fit. The top Picatinny rail is optimized for AR optics, so your favorite red dot or low-power variable scope mounts naturally. A flat-profile trigger with a crisp, predictable break rounds out the controls. Standard pump-action guts—dual extractors, steel-to-steel lockup, and twin action bars—deliver the reliability you expect from Mossberg's proven platform.
The 590RM ships with Mossberg's proprietary stabilizing-rib magazines; the base model includes one 10-round magazine (10+1 in the chamber). Aftermarket magazines are available in 5, 10, 15, and 20-round capacities, so you can configure loadouts for different missions. Accu-Choke compatibility lets you swap chokes to match your ammunition and intent. Whether you're running a defensive setup, running a course, or setting up for hunting, the 590RM adapts without compromise.
This is a shotgun built for shooters who think tactically but demand proven function—no gimmicks, just smart engineering and battle-tested durability.
| Gauge | 12 |
| Chamber | 2.75" |
| Capacity | 10 rounds (plus 1 in chamber) |
| Barrel Length | 18.5" with integrated heat shield |
| Barrel Finish | Matte |
| Safety | AR-style ambidextrous rotary selector |
| Stock | 5-position adjustable with interchangeable pad |
| Grip | MOE+ pistol grip |
| Forend | Compact design |
| Sights | Top Picatinny rail (MBUS sights optional) |
| Chokes | Accu-Choke (Cyl. Bore or Breacher) |
| Action | Pump action with dual extractors and twin action bars |
The 590RM uses Mossberg's first double-stack magazine design for pump-actions. This delivers more ammunition capacity in a shorter overall length compared to traditional tube magazines, making it ideal for shooters prioritizing both ammo count and a maneuverable profile. Magazines are available in 5, 10, 15, and 20-round options.
Yes. The 590RM stock base is compatible with Mil-Spec AR-style stocks, and it features the adjustable MOE+ pistol grip. The top Picatinny rail is optimized for AR optics, and the QD mounting ports support quick-detach sling systems. The rotary safety selector is AR-style and ambidextrous, so AR shooters will feel at home immediately.
The 590RM chambers 2.75" 12-gauge shells and ships with one 10-round magazine. It is Accu-Choke compatible, allowing you to swap chokes to match your ammunition type and application (Cyl. Bore or Breacher options are noted).
Yes. The 18.5" barrel, magazine-fed capacity, AR-platform ergonomics, and modular stock system make the 590RM well-suited for both roles. The integrated heat shield provides stand-off distance and helps manage recoil signature, and the Picatinny rail accommodates optics for faster target acquisition. Mossberg's proven pump-action reliability underpins it all.
SKU: 198466109 • Width: 9in • Height: 3.5in • Depth: 46.5in • Weight: 10.4oz