Mossberg 590RM 12Ga 18.5in Mag-Fed Pump Shotgun, 10-Rd

The Mossberg 590RM is a 12-gauge pump-action shotgun engineered for security and tactical applications. It uses a mag-fed configuration with an 18.5-inch stand-off barrel and an integrated heat shield to support sustained use. The rifle-style controls include a rotary safety selector and a Magpul MOE pistol grip on an adjustable 5-position stock. A top Picatinny rail with Magpul MBUS sights provides a platform for optics and accessories.

Key Specifications

• Gauge is 12 Gauge, built for standard 12-ga ammunition.
• The action type is pump-action for manual cycling.
• The barrel measures 18.5 inches and is a stand-off style with an integrated heat shield.
• The stock is a 5-position adjustable design with an interchangeable recoil pad.
• The grip is a Magpul MOE pistol grip in black.
• Safety is a rotary safety selector mounted on the receiver.
• The top of the receiver has a Picatinny rail and it ships with Magpul MBUS flip sights.
• The package includes 1 × 10-round magazine in a mag-fed configuration.
• The receiver is aircraft-grade aluminum to reduce weight while maintaining strength.
• Listed weight falls in the range of 7 lbs to 7.99 lbs.

Compact, configurable, and accessory-ready, the Mossberg 590RM combines magazine-fed convenience with a short stand-off barrel and modular furniture to suit duty and security roles. Its adjustable stock, robust receiver, and accessory rail make it adaptable to a variety of setups for users who prioritize straightforward, reliable function and flexible ergonomics.