CMMG Dissent MK4 300 Blackout 10.5" Pistol

The CMMG Dissent MK4: Compact Power in 300 Blackout

The 300 Blackout cartridge was designed to deliver rifle-class performance in short barrels, and the Dissent MK4 proves the concept works beautifully. At just 10.5 inches, this barrel length unlocks the full potential of 300 Blackout ammunition—whether you're running supersonic rounds for distance or subsonic loads for suppressed fire.

What Sets It Apart

Piston-Driven Simplicity Unlike conventional AR-15 platforms, the Dissent eliminates the buffer tube system entirely. This design choice delivers a genuinely compact package that's easy to maneuver in tight spaces and vehicles.

Tunable for Your Ammunition The adjustable gas block is a critical feature for 300 Blackout shooters. Fine-tune the system to run reliably with your preferred ammunition—whether that's full-power supersonic loads or subsonic rounds designed for suppressed use.

Trigger Quality The TriggerTech trigger breaks at 4.5 pounds with clean, single-stage operation. This is serious trigger quality, equally at home in a defensive pistol or a precision rifle.

Modular Accessories The 1913 Picatinny rail at the rear accepts any standard folding pistol brace or stock, letting you configure the platform to suit your needs. The 9.60-inch M-LOK handguard provides ample real estate for lights, lasers, and other tactical accessories.

Durable Finish Cerakote coating ensures your Dissent resists corrosion and wear, maintaining its appearance through years of use.

The Bottom Line

The Dissent MK4 represents thoughtful engineering for shooters who demand compact, reliable performance. Whether for home defense, hunting, or recreational shooting, this is a platform that rewards the shooter who takes time to understand its capabilities.