Mossberg 590RM Stand-Off – 12 Gauge, 18.5", 10+1 Mag-Fed Pump (50218)

The Mossberg 590RM is a magazine-fed 12 gauge pump-action shotgun with an 18.5-inch Cylinder Bore stand-off barrel and integrated heat shield, a 10-round detachable double-stack magazine (10+1 capacity), an AR mil-spec style 5-position adjustable stock and Magpul MOE pistol grip. Built for home and duty security use. Mossberg SKU 50218, UPC 015813502184.

This listing is for the 590RM stand-off barrel configuration (50218) only.

Double-Stack Magazines for a Pump Gun

Mossberg's 590RM uses the first production double-stack magazines made for pump-action shotguns, delivering more capacity per inch than competing designs. An enlarged, beveled loading port with exposed follower makes loading and clearing straightforward.

Rotary Safety Selector and AR-Style Ergonomics

• Ambidextrous AR-style rotary safety selector
• Flat-profile trigger with a smooth, crisp break
• 5-position adjustable stock with interchangeable recoil pad and 2 QD ports; LOP 12"–15.25"
• Compact, ergonomic forend and forward-mounted M-LOK bracket
• Top Picatinny rail for AR-style optics

Stand-Off Barrel with Integrated Heat Shield

The 18.5" Parkerized barrel is a stand-off (breacher-style) design with an integrated heat shield, bored Cylinder for wide, predictable patterns at close range.

This firearm ships to a licensed FFL dealer of your choice for transfer. The buyer must be legally eligible to purchase and possess it under federal, state and local law.

Specifications

• Manufacturer: Mossberg
• Model: 590RM
• SKU: 50218
• UPC: 015813502184
• Gauge: 12 GA
• Chamber: 2.75"
• Action: Pump
• Capacity: 10+1 (detachable magazine)
• Barrel: 18.5" stand-off, integrated heat shield, Parkerized
• Choke: Cylinder Bore
• Sights: Picatinny rail
• Stock: 5-position adjustable, interchangeable pad, MOE pistol grip, compact forend (black)
• Length of Pull: 12"–15.25" adjustable
• Overall Length: 37"
• Weight: 7.9 lbs