CMMG DISSENT MK4 300 AAC | 6.5″ | 30+1 | 30A0E33MB

The CMMG DISSENT MK4 is a compact AR-style pistol chambered in .300 AAC Blackout that pairs a 6.50-inch free-floated barrel with CMMG’s Compact Action to eliminate the buffer tube for improved portability. This configuration ships with two magazines, a 5.5″ M-LOK handguard and ambidextrous controls for versatile handling. The firearm’s Midnight Bronze Cerakote finish and aluminum frame provide durable, corrosion-resistant surfaces without excess weight. A small red-dot such as the Holosun HS503CU is a practical optic choice that stays well under common optics budgets and complements the DISSENT’s compact sight radius.

Product Specifications

• The caliber is .300 AAC Blackout.
• The action is Semi-Auto.
• The barrel measures 6.50 inches for compact handling.
• The magazine capacity is 30 rounds (30+1).
• The package includes 2 magazines.
• The optic footprint is Picatinny for common red-dot and low-power scopes.
• The barrel material is 4140 CM.
• The frame material is Aluminum.
• The grip material is Polymer.
• The finish is Midnight Bronze Cerakote.
• The weight is listed as 76 ounces.
• The pistol features an Ambidextrous safety.
• The muzzle is threaded 5/8-24″ to accept common muzzle devices.
• The handguard is a 5.5″ M-LOK free-float design for accessory mounting.
• The UPC is 810097508071.

The DISSENT MK4 is built around portability and modularity: CMMG’s Compact Action houses the recoil components in the upper receiver to remove the need for a buffer tube, and the pistol-style package keeps overall length minimal for transport and storage. The included magazines, ambidextrous controls and M-LOK handguard make it straightforward to set up for short-range range work and compact utility applications where local law permits. Its combination of a 6.5″ barrel, robust materials and modern controls provides an option for shooters who want an AR-platform pistol that emphasizes compactness without sacrificing accessory flexibility.

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