The AR15 platform has long been recognized for its modularity, and the CMMG 9mm DISSENT in the Mk4 configuration extends that advantage to 9mm shooters. The firearm accepts CMMG 9 AR Conversion magazines, which maintain the same profile as 5.56mm magazines for intuitive handling and employ true double stack feeding from top to bottom for efficient loading.
The 5.50″ M-LOK handguard provides streamlined accessory mounting options, while the 1913 picatinny rail end plate accommodates slings, pistol braces, or stocks*. The forward non-reciprocating side charging handle enables rapid operation without disrupting sight picture. The 9mm Radial Delayed Blowback Compact Action addresses the performance demands of 9mm ammunition by incorporating a fixed ejector in the upper receiver. This design yields a lighter bolt carrier group with reduced felt recoil while delivering consistent function across a broad spectrum of ammunition types and maintaining broad lower receiver compatibility.
The CMMG DISSENT MK4 features a 6.50″ barrel, 33-round capacity, Zeroed Linear Comp, and Zeroed Drop-In Single Stage Trigger in a black finish with Picatinny Brace Adapter. This configuration accommodates the full range of 9mm loadings, from supersonic to subsonic.






