CMMG Dissent MK4 9mm Rifle, 16.1" Barrel, Armor Black Finish

The CMMG Dissent MK4 9mm rifle brings modern AR ergonomics to a straightforward, controllable platform that's ideal for shooters seeking a compact, low-recoil semi-auto rifle. Built on the proven AR15 manual of arms but chambered in 9mm, this 16.1" barrel rifle handles like a standard modern rifle while delivering the softer shootability of pistol-caliber carbine performance. Whether you're working on accuracy at the range, running drills, or simply appreciating a no-fuss 9mm platform, the Dissent MK4 strips away complexity and keeps you focused on fundamentals.

The rifle rides on CMMG's compact-action, radial delayed blowback system—a design that tames recoil and helps you stay on target shot after shot. The 16.1" barrel pairs with a 1:10 twist rate optimized for 9mm ammunition, while the 4140CM steel construction ensures durability without unnecessary weight. At 6.6 pounds, the Dissent MK4 is nimble enough for extended range sessions or tactical work without sacrificing control. The muzzle wears a CMMG ZEROED brake tuned for the caliber, and it's threaded 1/2 x 28 for suppressor compatibility if you choose to go that route.

Ergonomics here lean on what works: a side-folding adjustable stock with cheek riser lets you dial in length of pull and sight picture, and a non-reciprocating charging handle keeps your sightline clean during operation. The 15-inch M-LOK handguard with integrated top picatinny rail gives you real estate for optics, lights, and other duty gear. Two 30-round 9mm AR conversion magazines are included—they load faster and easier than typical PCC mags thanks to true double-stack geometry. The Dissent MK4 also ships with CMMG's complete trigger and control package: ZEROED drop-in trigger, ambidextrous 60/90-degree safety, and ZEROED trigger guard and pistol grip. Built from 7075 T6 aluminum throughout and finished in Armor Black Cerakote, this rifle is built to work.

Key Features

• 16.1" 4140CM steel barrel, 1:10 twist rate optimized for 9mm
• Compact-action radial delayed blowback operating system for low recoil and fast target recovery
• DISSENT side-folding stock with adjustable length of pull and cheek riser
• Non-reciprocating side charging handle allows manipulation without breaking sight picture
• M-LOK handguard with integrated top picatinny rail for easy accessory mounting
• Includes two 30-round 9mm AR conversion magazines with true double-stack feeding
• ZEROED trigger, safety, trigger guard, and pistol grip for consistent controls
• 1/2 x 28 muzzle threads; ships with CMMG ZEROED brake
• 7075 T6 aluminum upper and lower receivers; Armor Black Cerakote finish
• Weighs 6.6 pounds; collapses to 25.9 inches for compact transport or use

Specifications

Frequently Asked Questions

Is the CMMG Dissent MK4 9mm rifle suppressor-ready?

Yes. The barrel is threaded 1/2 x 28 and ships with a CMMG ZEROED muzzle brake. You can replace the brake with a suppressor of compatible thread pitch and design.

What magazines does this rifle use, and are they included?

The Dissent MK4 uses CMMG 9mm AR conversion magazines, which fit standard AR magwells and feature true double-stack design for faster loading than some other PCC options. Two 30-round magazines are included with the rifle.

Can I fold the stock, and does it affect operation?

Yes. The DISSENT side-folding stock collapses for transport or tight spaces, reducing the overall length to 25.9 inches. The stock adjusts for length of pull and cheek riser when deployed. Folding does not affect the rifle's ability to operate.

Is the charging handle on the left or right side?

The DISSENT side charger is reversible, so you can set it to either side to match your dominant hand or shooting preference. It's a non-reciprocating design, which means it doesn't move during firing and won't interfere with your sightline or cheek weld.