CMMG Dissent Mk4 .22 ARC 16.1" 1:7 Twist Complete Upper - Tungsten

The CMMG Dissent Mk4 complete upper group chambers the modern .22 ARC cartridge in a 16.1" barrel configuration designed for CMMG's compact Dissent platform. This upper assembly features a 1:7 twist rate optimized to stabilize a wide range of .22 caliber bullet weights for the high-velocity .22 ARC (AR-15 Cartridge) loading.

The upper receiver is machined from 7075-T6 aluminum and is paired with CMMG's 15" proprietary handguard machined from 6061-T6 aluminum. Both components are finished in Tungsten Cerakote for corrosion and wear resistance. An adjustable .750" gas block sits beneath the handguard, allowing fine-tuning of the direct impingement operating system to match ammunition and environmental conditions.

This complete upper ships as a fully assembled group including the 16.1" .22 ARC barrel, DISSENT-pattern upper receiver, handguard, and adjustable gas block - everything needed to drop onto a Dissent Mk4 lower receiver and build out a compact rifle or pistol configuration in .22 ARC.

Proudly manufactured by CMMG in the USA, the Dissent Mk4 .22 ARC upper brings the .22 ARC chambering to a compact, side-folding platform that uses standard AR-pattern magazines while delivering impressive .22 caliber ballistics from the modernized 6.8 SPC case.