Mossberg Expands Tactical Lineup with New 590RM and 590R Chisel Shotguns [Video]

June 10, 2026 Videos

The Chisel folding stock mechanism allows the 590RM Chisel and 590R Chisel to transition quickly between compact and full-size setups. — *The Chisel folding stock mechanism allows the 590RM and 590R Chisel to transition quickly between compact and full-size setups.*

Mossberg expanded its tactical shotgun lineup for 2026 with the debut of the new 590RM Chisel and 590R Chisel. Designed for defensive and tactical applications, these upgraded pump-action shotguns introduce modern ergonomics, folding stock systems, and improved controls for today’s shooters.

The Mossberg 590RM Chisel is a magazine-fed tactical pump shotgun introduced at SHOT Show 2026. It features a rotating safety system, folding stock mechanism, suppressor-ready barrel, and detachable magazine compatibility.

*Mossberg’s new rotating safety system improves ergonomics for pistol grip shotgun configurations.*

What Is the Mossberg 590RM Chisel?

The standout model is the 590RM Chisel, a compact, magazine-fed pump shotgun designed around modularity and modern ergonomics. RM stands for “Rotating Magazine,” and one of the defining features is its rotating safety system. Unlike traditional Mossberg tang safeties, the rotating safety allows shooters to comfortably run a pistol grip configuration without needing to reach over the receiver.

Key Features of the Mossberg 590RM

Another major feature is the Chisel folding stock mechanism. Mossberg partnered with Chisel Machining to develop a trigger housing and folding system that transforms the platform from an ultra-compact configuration into a fully stocked tactical shotgun in seconds. The design also accepts AR-style stocks, allowing shooters to customize the setup to their preferences.

The Mossberg 590 RM Chisel combines a compact 11-inch barrel with detachable magazine functionality. — *The Mossberg 590RM Chisel combines a compact 11-inch barrel with detachable magazine functionality.*

The 590RM Chisel features an 11-inch barrel and comes suppressor-ready with threaded muzzle compatibility. According to Mossberg, shooters can run suppressors such as JK Armament cans or similar shotgun suppressor systems. The shotgun uses detachable box magazines available in 5-, 10-, 15-, and 20-round capacities.

Despite the presence of a tubular fore-end assembly, the RM Chisel is strictly magazine-fed. The tube beneath the barrel serves only as the guide system for the pump action and does not function as an ammunition tube.

Mossberg also emphasized ambidextrous handling. The slide release is positioned so right-handed shooters can manipulate it with their thumb, while left-handed shooters can easily access it with their trigger finger.

*The threaded barrel on the 590RM Chisel allows shooters to run compatible suppressor systems.*

Mossberg 590R Chisel Features

For buyers who prefer a more traditional setup, Mossberg also introduced the 590R Chisel. This model retains the rotating safety and Chisel folding stock arrangement but uses a conventional tube-fed configuration. The 590R ships with Magpul flip-up sights and maintains compatibility with optics and aftermarket sight systems.

Together, the 590RM and 590R Chisel represent Mossberg’s latest effort to modernize the pump shotgun platform with improved ergonomics, modularity, and compact tactical functionality.

Mossberg 590RM vs. 590R Chisel Comparison Chart

Feature	590RM Chisel	590R Chisel
	BUY NO W	BUY NOW
Action	Pump-Action	Pump-Action
Feeding System	Detachable Magazine	Tube-Fed
Safety System	Rotating Safety	Rotating Safety
Barrel Length	11 inches	Standard Tactical Length
Suppressor Ready	Yes, Threaded Barrel	Not Mentioned
Folding Stock	Chisel Folding Mechanism	Chisel Folding Mechanism
Stock Compatibility	AR-Style Stocks	AR-Style Stocks
Optics Ready	Yes	Yes
Included Sights	Optic Ready	Magpul Flip-Up Sights
Magazine Capacity Options	5 / 10 / 15 / 20 Round	Tube Capacity
Ambidextrous Controls	Yes	Yes

Key Features of the Mossberg 590RM and 590R Chisel Highlighted in the Video

New rotating safety system optimized for pistol grip use
Chisel folding stock mechanism
Magazine-fed pump shotgun design on the 590 RM Chisel
Suppressor-ready threaded barrel
AR-style stock compatibility
Ambidextrous slide release placement
Magpul flip-up sights on the 590 R
Compact tactical configuration designed for defensive applications

Final Thoughts on the New Mossberg Tactical Shotguns

With the introduction of the 590RM and 590R Chisel, Mossberg is bringing modern tactical features to the pump shotgun category in a serious way. From detachable magazine capability and suppressor readiness to folding stock adaptability and improved controls, both shotguns are designed for shooters looking for a more modular defensive platform.

590RM Chisel

590R Chisel

All Mossberg

FAQ on the Mossberg 590RM and Mossberg 590R Chisel Tactical Shotguns:

What Is the Mossberg 590RM Chisel?

The Mossberg 590RM Chisel is a compact, magazine-fed tactical pump shotgun unveiled at SHOT Show 2026. Built on Mossberg’s trusted 590 platform, the 590RM features a rotating safety system, detachable box magazines, a folding Chisel stock, and a suppressor-ready threaded barrel. Designed for defensive and tactical use, the shotgun combines modern ergonomics with modular customization options, including compatibility with AR-style stocks and optics-ready setups.

Is the Mossberg 590RM Magazine-Fed?

Yes, the Mossberg 590RM Chisel is a magazine-fed pump shotgun that uses detachable box magazines instead of a traditional tube-fed system. Mossberg offers multiple magazine capacities, including 5-, 10-, 15-, and 20-round magazines. This detachable magazine design allows for faster reloads and increased ammunition flexibility compared to standard pump-action shotguns.

What Is the Rotating Safety System on the 590RM?

The rotating safety system on the Mossberg 590RM is a redesigned safety selector created specifically for pistol grip shotgun configurations. Unlike Mossberg’s traditional tang-mounted safety, the rotating safety allows shooters to engage or disengage the safety without changing their firing grip. This improves ergonomics, speed, and accessibility for both right-handed and left-handed users during tactical or defensive shooting situations.

Does the Mossberg 590RM Support Suppressors?

Yes, the Mossberg 590RM Chisel is suppressor-ready and includes a threaded barrel designed to accept compatible shotgun suppressors. Mossberg showcased the platform with suppressor compatibility during SHOT Show 2026, including support for systems such as JK Armament shotgun suppressors. The compact 11-inch barrel and tactical design make the 590RM suitable for suppressed defensive and close-quarters applications.

What Is the Difference Between the 590RM and 590R Chisel?

The primary difference between the Mossberg 590RM and the Mossberg 590R Chisel is the feeding system. The 590RM uses detachable box magazines, while the 590R retains a traditional tube-fed pump shotgun design. Both shotguns feature Mossberg’s rotating safety system, Chisel folding stock mechanism, ambidextrous controls, and optics-ready compatibility. However, the 590RM focuses on modular, magazine-fed tactical performance, while the 590R offers a more conventional tactical shotgun setup with included Magpul flip-up sights.