CMMG Dissent Mk3 8.6 Blackout AR Pistol, 12.5″ Barrel

The CMMG Dissent Mk3 is an AR pistol chambered in 8.6 Blackout and configured with a 12.5-inch Black Nitride threaded barrel. Its AR10-sized platform includes a Coyote Tan Cerakote aluminum receiver, M-LOK handguard, Picatinny rails, and ambidextrous controls for range and sporting use.

The 8.6 Blackout cartridge uses .338-caliber projectiles, and the platform is built around a quick 1:3 barrel twist for performance from a shorter barrel. The threaded barrel also supports compatible muzzle accessories.

Key Specifications

• The firearm is chambered in 8.6 Blackout.
• The configuration provides a capacity of 20+1 rounds.
• The barrel measures 12.5 inches and features a Black Nitride finish.
• The action is semi-automatic.
• The receiver is made from aluminum with a Coyote Tan Cerakote finish.
• The handguard uses an M-LOK attachment system.
• The firearm includes a Picatinny top rail and rear Picatinny rail.
• The grip is a CMMG Zeroed grip.
• The controls are ambidextrous.
• The listed weight is 7.30 pounds.

With its compact 12.5-inch barrel, modern modular furniture, and 8.6 Blackout chambering, the Dissent Mk3 offers a practical configuration for shooters seeking a capable AR platform with adaptable mounting options and balanced handling.

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