CMMG Dissent Mk3 8.6 Blackout 12.5" Rifle

$2,057.52 Out of stock

CMMG Dissent Mk3 in 8.6 Blackout features a 12.5" black nitride threaded barrel, coyote tan cerakote receiver, M-LOK handguard, and ambidextrous controls. 20-round capacity.

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CMMG Dissent Mk3: 8.6 Blackout Performance

The Dissent Mk3 in 8.6 Blackout represents a significant evolution in modern rifle design. This cartridge builds upon the proven success of 300 Blackout while stepping up to larger .338 caliber projectiles on the AR10-sized platform.

Ballistic Advantages

8.6 Blackout delivers:

  • Exceptional performance from short barrels—this 12.5" configuration is no exception
  • Superior suppression characteristics matching 300 Blackout
  • Heavier, more substantial .338 caliber bullets for increased terminal performance
  • 1:3 barrel twist optimized for this cartridge's velocity and bullet weight range

Build Quality and Features

  • Barrel: 12.5" black nitride finish with 1/2x28 threading for suppressor mounting
  • Receiver: Coyote tan cerakote aluminum with integrated Picatinny rail
  • Handguard: M-LOK compatible for modern accessory mounting
  • Controls: Ambidextrous design for left and right-handed shooters
  • Grip: CMMG-designed ergonomic grip with integrated controls
  • Capacity: 20-round magazine

The Practical Choice

Whether you're building a suppressed hunting rifle, a tactical platform, or exploring modern intermediate cartridges, the Dissent Mk3 in 8.6 Blackout offers a refined, purpose-built solution that performs reliably in real-world conditions.

Attributes

Action: Semi-Automatic
Barrel Length: 12.5"
Caliber: 8.6 Blackout
Capacity: 20+1
Grips: CMMG Zeroed
Overall Length: 23"
Safety: CMMG Zeroed 60/90 Degree
Sights: None
Weight: 7.3 lbs