CMMG Dissent Mk4 338arc 10-Round Rifle

The CMMG Dissent Mk4 338arc 10-Round Rifle is a purpose-built, short-barrel platform engineered for tactical operators and civilian shooters who demand compact, hard-hitting performance in confined spaces. Chambered in .338 ARC—a modern intermediate cartridge that delivers rifle-class ballistics from a platform shorter than traditional 5.56 rifles—this rifle excels in close-quarters combat, vehicle operations, and tactical applications where maneuverability trumps ultra-long-range capability. The 10.5-inch barrel strikes the critical balance between velocity retention and handlability that experienced operators have demanded for the past decade.

CMMG's Dissent platform utilizes an optimized short-stroke piston system that cycles reliably with .338 ARC's higher pressure curve while minimizing recoil and keeping the shooter on target through rapid follow-up shots. The 10-round magazine capacity reflects the cartridge's case size and ammunition availability, providing realistic combat loads without sacrificing reload speed in dynamic scenarios. B5 Systems ergonomic controls and furniture reduce fatigue during extended deployments, while the modular design allows for rail-mounted accessories—optics, lights, and suppressors—without compromising the weapon's compact footprint. The lightweight construction at approximately 1 pound (receiver/upper group) ensures the rifle remains handy during prolonged operations.

Law enforcement tactical teams, military personnel conducting close-quarters operations, and precision-focused civilian shooters benefit most from the Dissent Mk4's ballistic efficiency and ergonomic design. The .338 ARC cartridge has proven itself in real-world defensive and duty use, offering superior penetration through intermediate barriers compared to 5.56 NATO while remaining subsonic-compatible for suppressed work. Installation and operation follow AR-platform conventions, making this rifle immediately familiar to users trained on the M4 or civilian AR-15, eliminating the learning curve associated with unfamiliar manual-of-arms. FFL transfer required at purchase.