The CMMG DISSENT 9MM 16.1" upper receiver group brings a different approach to 9mm pistol-caliber carbines. Built on CMMG's Compact Action and Radial Delayed Blowback operating system, this upper packages the complete bolt carrier, action, and recoil system directly into the receiver—no buffer tube required. That unconventional design translates to softer recoil impulse and compatibility with a broader range of 9mm ammunition than traditional blowback PCCs. It's built for shooters who want a modern, soft-shooting 9mm platform without the complexity of a full AR-15 buffer assembly.

The 16.1" barrel rides in a CMMG MT contour profile and threads at 1/2 x 28, wearing a CMMG ZEROED muzzle brake. The upper itself is machined from 7075-T6 aluminum and finished in black Cerakote. A reversible side charger (non-reciprocating) lets you manipulate the bolt while your sight picture stays downrange, and you can swap it from left to right hand operation in the field. The 15" proprietary CMMG handguard provides mounting real estate, while a 1913 Picatinny rail end cap replaces the standard buffer tube extension.

Compatibility depends on your lower receiver. The DISSENT upper works with mil-spec AR-15 lowers when you use CMMG's proprietary AR Conversion Mags, or it mates directly to CMMG's Mk4, Mk17, and MkGs lower receivers. That flexibility makes it possible to adapt or build around existing AR parts you may already own. At 4.85 lbs and 25.5" overall, it's a handy, balanced package for anything from 3-gun to home defense training.

The CMMG DISSENT 9MM 16.1" upper receiver group brings a different approach to 9mm pistol-caliber carbines. Built on CMMG's Compact Action and Radial Delayed Blowback operating system, this upper packages the complete bolt carrier, action, and recoil system directly into the receiver—no buffer tube required. That unconventional design translates to softer recoil impulse and compatibility with a broader range of 9mm ammunition than traditional blowback PCCs. It's built for shooters who want a modern, soft-shooting 9mm platform without the complexity of a full AR-15 buffer assembly.

The 16.1" barrel rides in a CMMG MT contour profile and threads at 1/2 x 28, wearing a CMMG ZEROED muzzle brake. The upper itself is machined from 7075-T6 aluminum and finished in black Cerakote. A reversible side charger (non-reciprocating) lets you manipulate the bolt while your sight picture stays downrange, and you can swap it from left to right hand operation in the field. The 15" proprietary CMMG handguard provides mounting real estate, while a 1913 Picatinny rail end cap replaces the standard buffer tube extension.

Compatibility depends on your lower receiver. The DISSENT upper works with mil-spec AR-15 lowers when you use CMMG's proprietary AR Conversion Mags, or it mates directly to CMMG's Mk4, Mk17, and MkGs lower receivers. That flexibility makes it possible to adapt or build around existing AR parts you may already own. At 4.85 lbs and 25.5" overall, it's a handy, balanced package for anything from 3-gun to home defense training.