Mossberg 50221 590M 12 Gauge 10+1 18.50" Tungsten Gray Cerakote Barrel & Steel Drilled & Tapped Receiver, Magpul SGA Black Synthetic Stock
$879.39
$1,106.00
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The Mossberg 590M is a magazine-fed pump-action shotgun built for shooters who want modern tactical capability without sacrificing the reliability of a time-tested platform. This 12-gauge delivers the familiar pump-gun controls and durability Mossberg is known for, but strips away the tube-magazine limitations that can slow tactical work or competition shooting. With a 10-round detachable magazine and the ability to swap in spares of different capacities (5, 10, 15, or 20-round options available), the 590M adapts to your mission—whether that's home defense, duty use, or flat-range training.
The 18.5-inch heavy-walled barrel wears Mossberg's Tungsten Gray Cerakote finish, which resists wear and corrosion far better than blued or parkerized steel. The receiver is drilled and tapped, ready to mount a red dot or other micro dot sight (RMSc footprint) directly. Factory iron sights include a rear metal ghost ring and front fiber optic sight with low-profile protective wings, so you're combat-ready out of the box. The adjustable Magpul SGA synthetic stock (12.25–14.25 inches, with spacers included) lets you dial in your length of pull for a proper fit in gear or different shooting positions.
Internally, the 590M features dual extractors, steel-to-steel lockup, an ambidextrous top-mounted safety, and twin action bars—the same proven design that's run flawlessly in tens of thousands of Mossberg pumps. The magazine itself has stabilizing ribs that engage the receiver for rock-solid lockup. This is a serious working shotgun for shooters who demand reliability and are willing to invest in a platform that keeps pace with modern tactics and training.
Key Features
- Magazine-fed design with 10-round factory mag; additional 5-, 10-, 15-, and 20-round magazines available
- Drilled and tapped receiver accepts micro dot sights (RMSc footprint) without gunsmithing
- Tungsten Gray Cerakote barrel and receiver for superior corrosion and abrasion resistance
- Dual extractors and steel-to-steel lockup for legendary Mossberg reliability
- Ambidextrous top-mounted safety and twin action bars for intuitive operation
- Metal ghost ring rear sight and fiber optic front sight included; low-profile design for optic clearance
- Adjustable Magpul SGA synthetic stock with included spacers for 12.25–14.25-inch length of pull
- Cylinder bore choke (fixed) and 2.75-inch chamber
Specifications
| Gauge | 12 |
| Action Type | Pump-Action |
| Chamber | 2.75 inch |
| Barrel Length | 18.5 inch |
| Barrel Finish | Cerakote Tungsten Gray |
| Choke | Cylinder Bore |
| Magazine Capacity | 10+1 (detachable magazine) |
| Overall Length | 38 inches |
| Length of Pull | 12.25–14.25 inches (adjustable with spacers) |
| Sights | Metal ghost ring rear, fiber optic front; optic-ready receiver |
| Stock | Magpul SGA, adjustable synthetic, black |
| Weight | 9.25 lb |
Frequently Asked Questions
Can I mount a red dot or other optic on the 590M without modifications?
Yes. The receiver is drilled and tapped and ready to accept micro dot sights with RMSc footprint. Simply remove the rear sight plate and mount your optic directly to the receiver.
What magazines work with the Mossberg 590M?
The shotgun ships with one 10-round detachable magazine. Mossberg offers factory magazines in 5-, 10-, 15-, and 20-round capacities, all compatible with the 590M platform.
Is the adjustable stock really adjustable, and what's included?
Yes. The Magpul SGA stock adjusts from 12.25 to 14.25 inches length of pull using the included spacers, so you can dial in the fit for different shooting situations, gear, or body type.
What ammo does the 590M shoot?
The 590M is chambered for 2.75-inch 12-gauge shells with a cylinder bore choke. Consult Mossberg's documentation or a qualified armorer for specific load recommendations.
