Cmmg Dissent Mk4 Braced 9Mm 10.5 Armor Black

The CMMG Dissent Mk4 Braced 9mm is a compact, AR-platform pistol built around CMMG's proprietary Mk4 design and available in a 10.5-inch configuration. If you're looking for a 9mm AR pistol that handles like a rifle but stays nimble in tight spaces, this one delivers the familiar controls and ergonomics of an AR in a form factor that's genuinely handy for home defense, truck guns, or range duty. The Dissent uses a radial delayed blowback operating system housed entirely in the upper receiver, which means no AR buffer tube to complicate the receiver extension—instead you get a 1913 Picatinny rail end cap that accepts an arm brace or other stabilizing device.

Chambered in 9mm, the Dissent runs CMMG's own 30-round magazines through a standard AR15-pattern magwell, so ammunition and mags are easy to source and swap. The 10.5-inch barrel (4140CM steel, 1:10 twist) pairs with a CMMG ZEROED linear compensator threaded 1/2 x 28, keeping recoil and muzzle rise manageable in a shorter package. The side-charging handle is mounted left-hand, giving you smooth bolt manipulation without taking your eyes off target or breaking your grip. Build quality is solid: 7075-T6 aluminum upper and lower receivers, Cerakote finish in Armor Black, and a complete set of CMMG ZEROED controls—trigger guard, safety, and grip—that make operation intuitive for shooters familiar with AR ergonomics.

The 9.6-inch proprietary CMMG handguard keeps things tight without sacrificing rail space for mounting lights, lasers, or iron sights. The included drop-in single-stage trigger is clean and breaks crisply. Two 30-round magazines come in the box, so you've got immediate capacity right out of the door. Whether you're running it as an SBR with a proper stock or as a braced pistol, the Dissent Mk4 9mm punches above its size.

Key Features

• 10.5-inch 4140CM barrel with 1/2 x 28 threading and CMMG ZEROED linear compensator
• Radial delayed blowback operating system contained in upper receiver—no buffer tube required
• Left-side non-reciprocating charging handle for smooth manipulation while aiming
• Standard AR15 magwell compatible with CMMG 9mm conversion magazines (two 30-rounders included)
• 7075-T6 aluminum upper and lower receivers finished in durable Cerakote
• Complete CMMG ZEROED controls: drop-in single-stage trigger, safety selector, trigger guard, and grip
• 9.6-inch proprietary CMMG handguard with mounting options
• 1913 Picatinny rail end cap for brace or stock attachment

Specifications

Frequently Asked Questions

What magazines work with the Dissent Mk4 9mm?

The Dissent uses a standard AR15-pattern magwell and is compatible with CMMG 9mm AR conversion magazines. Two 30-round magazines are included with the pistol.

Does the Dissent Mk4 require an AR buffer tube and stock?

No. The radial delayed blowback operating system is contained entirely in the upper receiver, eliminating the need for a conventional AR buffer system. The receiver extension features a 1913 Picatinny rail end cap, which allows you to attach an arm brace or stock as desired.

What's the charging handle configuration on this pistol?

The Dissent Mk4 comes with a left-hand side charging handle that is non-reciprocating, allowing you to operate the bolt smoothly without taking your sight picture off target.

Can I mount optics or accessories to the Dissent Mk4?

Yes. The 9.6-inch proprietary CMMG handguard provides mounting options, and the receiver extension includes a 1913 Picatinny rail end cap for attachment of braces, stocks, or other accessories.