Mossberg 590R/RM Shotguns Now With Chisel Machining Folding Stocks

Eric B
by Eric B

Mossberg has expanded its 590R and 590RM pump-action shotgun lineup with the introduction of the new 590R Chisel and 590RM Chisel, developed in collaboration with Chisel Machining. These new configurations pair Mossberg’s pistol-grip rotary safety platform with Chisel Machining’s folding stock mount, adding compact handling and enhanced ergonomics to the 590R/RM series.

The 590R series uses a pistol-grip, rotary safety selector and retains core Mossberg features such as dual extractors, positive steel-to-steel lockup, twin action bars, and an anti-jam elevator for consistent feeding and operation. The line’s ergonomically shaped forend and integrated barrel/heat shield combination support practical use in defensive and tactical settings.

The Chisel Folding Stock Mount allows the 8-position adjustable LOP stock to be folded completely along the reverse side of the receiver.

In the new full-size configuration, the model equipped with an 18.5-inch barrel delivers a balanced shooting platform with traditional tube-fed capacity. Its receiver and components are finished in Flat Dark Earth Cerakote for corrosion resistance and durability.

For operators prioritizing compact maneuverability, the magazine-fed version pairs an 11.5-inch barrel with a detachable 10-round box magazine, offering increased firepower in a shorter package. Both configurations include the Chisel folding stock system that allows the adjustable length-of-pull stock to fold alongside the receiver for storage or transport without sacrificing stability when unfolded.

Standard features of the 590R/590RM family include an ambidextrous rotary safety reachable without shifting grip, a flat-profile trigger for a clean break, and a Picatinny top rail optimized for optics, along with accessory-ready M-LOK slots on select models. These enhancements make the new models adaptable for a range of professional and enthusiast applications.

Key Features of the 590R/RM Chisel Pump-Action Shotguns:

  • Ambidextrous, rotary safety selector that can be reached without breaking grip.
  • Mossberg-designed stock with eight positions of adjustment (12.5 – 16.0 inches),
  • interchangeable recoil pad, and 2-sided QD cups. The front QD cup is located on the mag cap.
  • Chisel Machining folding stock mount.
  • Magpul MOE+ pistol grip.
  • Accu-Choke™ System for adding a suppressor.
  • Flat profile trigger with smooth, crisp break.
  • Top Picatinny rail for ease of adding optics.
  • Enlarged, beveled loading port with extended follower for ease of loading (590R only).
  • Elongated bolt release.
  • E-coated internal and external receiver for durability and smoother finish.

MSRP is $1,330 (590R Chisel 7-Shot) and $1,435 (590RM Chisel NFA/Class 3).

For full specifications and dealer information, visit Mossberg’s official product page: https://www.mossberg.com/firearms/shotguns/590r-rm.html

Eric B
Eric B

Ex-Arctic Ranger. Competitive practical shooter and hunter with a European focus. Always ready to increase my collection of modern semi-automatics, optics, thermals and suppressors. TCCC Certified. Occasionaly seen in a 6x6 Bug Out Vehicle, always with a big smile.

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