Mossberg 590RM 12GA 18.5″ Adjustable Stock

The Mossberg 590RM 12GA 18.5″ Adjustable Stock is a modern pump-action shotgun designed around Mossberg’s proven 590 platform. Featuring a detachable magazine system, the 590RM offers rapid reloads while maintaining the rugged reliability that has made the 590 series one of the most respected pump-action shotguns available.

Chambered for 2¾-inch and 3-inch 12 gauge shotshells, the shotgun is equipped with an 18.5-inch barrel that balances compact handling with dependable performance. The adjustable stock allows shooters to customize the fit, while the pump-action design provides reliable cycling with a wide variety of ammunition.

The receiver is drilled and tapped for optics, and the shotgun is equipped with a front bead sight for quick target acquisition. Whether you’re looking for a dependable range shotgun or a versatile manually operated platform, the Mossberg 590RM delivers the durability and performance expected from the Mossberg name.

Specifications

Manufacturer: Mossberg
Model: 590RM
Gauge: 12GA
Barrel Length: 18.5″
Chamber: 2.75″
Capacity: 10+1 (detachable magazine)
Stock: 5-position adjustable w/ MOE pistol grip
Sights: Magpul MBUS3
Safety: Rotary ambidextrous
Rail: Top Picatinny
Weight: ~8.5 lbs
Classification: Non-Restricted
Made in USA

Product Notes: The 590RM is Mossberg’s most advanced mag-fed shotgun. Built for tactical performance and modularity.