CMMG Dissent .22 ARC 16.1" 6061-T6 Aluminum Upper Receiver Rifle

The CMMG Dissent .22 ARC 16.1" 6061-T6 Aluminum Upper Receiver Rifle represents a modern approach to precision rimfire shooting and training. Chambered in the efficient .22 ARC cartridge, this purpose-built upper receiver addresses a critical need: providing shooters with a cost-effective, low-recoil platform for skill development, small game hunting, and high-volume range work. Law enforcement and military trainers have long leveraged .22 platforms to maintain marksmanship proficiency without the expense and wear associated with centerfire training regimens.

Built on a 6061-T6 aluminum upper receiver, the Dissent delivers the durability and precision expected from CMMG's engineering standards while maintaining a lightweight profile at 6.22 pounds. The 16.1-inch barrel length provides an optimal balance between velocity, handling characteristics, and practical accuracy at typical engagement distances. The .22 ARC cartridge itself offers superior ballistic performance compared to traditional .22 Long Rifle, delivering flatter trajectories and more reliable expansion downrange—critical factors when precision matters. This upper receiver assembly integrates seamlessly with standard AR-platform lower receivers, enabling shooters to leverage existing infrastructure and familiarity with controls and ergonomics.

Tactical professionals, competition shooters, and firearms instructors benefit most from this configuration. The rifle excels in training scenarios where ammunition cost and shooter fatigue are limiting factors, allowing extended practice sessions that build consistency and speed. Installation requires only mating the upper receiver to a compatible AR-15 lower receiver—no gunsmithing necessary. Shooters transitioning from centerfire platforms will appreciate the identical ergonomics and manual of arms, making the Dissent an invaluable training tool within law enforcement and civilian tactical communities.