For operators and serious enthusiasts seeking a compact, high-energy AR-style platform, the latest CMMG offering brings large-bore performance to a bufferless, pistol-configured package. Its design focuses on folding-stock compatibility, suppressed shooting ease, and straightforward ergonomics for modern shooting stances.

CMMG DISSENT MK4 [AB] blends the proven AR ergonomics with CMMG’s Compact Action system, delivering direct impingement reliability without a buffer tube assembly.

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Key design features

The DISSENT MK4 [AB] is built around CMMG’s patented Compact Action system that enables direct impingement cycling without the traditional buffer tube. That bufferless receiver architecture allows use of folding stocks and pistol braces—ideal for compact carry and confined-space maneuvering. The side charging handle sits forward of the action, is non-reciprocating for safer suppressed use, and is reversible for left-handed shooters.

Hardware and accessories

This 2025 model ships in a pistol configuration with a 6.5-inch barrel, a Z-series linear compensator to manage muzzle impulse, and CMMG’s proprietary MLOK handguard for modular accessory placement. The Armor Black Cerakote finish resists wear, and the receiver includes a 1913 Picatinny adapter for mounting aftermarket pistol braces. One 10‑round magazine is included, and the package reflects thoughtful component choices for a compact, controllable shooting platform.

At a listed price of $1773.99, the DISSENT MK4 [AB] targets buyers who want large-bore terminal performance in an AR-form factor. View product details and pricing on the shop page.

Caliber performance: .338 ARC advantages

CMMG introduces this platform chambered in Hornady’s .338 ARC to provide more energy on target than common subsonic options while preserving the AR-style handling shooters expect. The .338 ARC offers subsonic and supersonic versatility similar to .300 BLK but with increased kinetic energy and reduced need for gas-system tuning when switching between suppressed and unsuppressed setups. That makes the DISSENT MK4 [AB] suitable for medium-game hunting, precision work inside practical ranges, and applications where a compact, powerful package is preferred.

Why this model stands out

The combination of CMMG’s Compact Action, folding-stock capability, a forward side charger, and chambering in .338 ARC makes the DISSENT MK4 [AB] a unique entry for users wanting AR-type controls with enhanced terminal performance. For anyone evaluating compact tactical options that balance portability and power, this model merits hands-on inspection and test fire.

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