Mossberg 590RM 12 Gauge Pump-Action, 18.5 inch AccuChoke Barrel, Detachable 10-Round Magazine, Matte Black
This Mossberg 590RM is a magazine-fed 12 gauge pump-action configured with an 18.5 inch AccuChoke barrel, ventilated heat shield, and flip-up sights on Picatinny rails. It uses 590M-pattern detachable double-stack magazines for 2.75-inch shells only and comes in excellent condition with its factory box and paperwork. Notable features include an aluminum alloy receiver, adjustable synthetic carbine-style stock with thick recoil pad and pistol grip, rotary safety selector, and a flat-profile trigger. Made in the USA, SKU/MPN 50213.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: Minor scratches and blemishes are present on the exterior surfaces.
What's Included
- Mossberg factory cardboard box with end label (SKU 50213)
- Paperwork
- 1x 10-round Mossberg 590M-pattern detachable polymer double-stack magazine
The 590RM system brings detachable-magazine capability to the proven Mossberg pump platform. This example ships with a 10-round 590M-pattern magazine and is rated at 10+1 capacity using 2.75-inch shells. The detachable double-stack magazine design streamlines loading and keeps the gun running with consistent shell presentation.
The 18.5 inch steel AccuChoke barrel is paired with a cylinder choke and an integrated ventilated polymer heat shield. The bore presents a clean, mirror finish. The chamber is cut for 2.75-inch shells, matching the 590M-pattern magazine specification.
Sighting and mounting options are built in: a receiver-top Picatinny rail and a short forward rail support accessories, while flip-up front and rear sights ride on the rails for a clear sight picture. The box end label also notes MBUS. A front magazine-tube clamp incorporates M-LOK-style slots for additional attachment points.
Ergonomics and controls include an adjustable synthetic carbine-style stock with a thick recoil pad and a pistol grip for a solid hold. The rotary safety selector sits above the trigger for intuitive access, and the trigger itself features a flat-profile shoe.
The aluminum alloy receiver wears a matte black factory finish with a North Haven, CT USA rollmark. Overall length is 36.9 inches and weight is approximately 8.0 lb. This recent-release configuration is cataloged under MPN 50213 and was manufactured in the USA.