The CMMG Dissent Mk3 pistol in 8.6 Blackout with a 12.5-inch barrel and Coyote Tan Cerakote finish (brand part no. 33A380C-CT) brings the larger, harder-hitting sibling of .300 Blackout to CMMG’s AR10-sized Dissent Mk3 platform. CMMG gives the 8.6 Blackout cartridge a quick 1:3 barrel twist that performs well from shorter barrels and suppresses effectively despite its larger .338-caliber projectile. The black nitride threaded barrel is housed in an M-LOK handguard with a Picatinny top rail, and a black polymer SB Tactical folding brace collapses the platform for storage and transport. A CMMG Zeroed 60/90-degree safety selector rounds out the controls. Among large-format semi-auto handguns, this Dissent Mk3 configuration favors shooters who want a suppressor-friendly big-bore AR pistol.

Key Specifications

• The chambering is 8.6 Blackout.
• The capacity is 20+1 rounds.
• The barrel measures 12.5 inches with a black nitride finish and is threaded.
• The receiver is finished in Coyote Tan Cerakote with a Picatinny top rail.
• The handguard is M-LOK, supporting accessory mounting.
• The brace is a black polymer SB Tactical folding brace, collapsing for storage.
• The safety is a CMMG Zeroed 60/90-degree selector.
• The action is semi-automatic, cycling a fresh round into the chamber with every trigger pull.
• The barrel uses a fast 1:3 twist rate, matched to 8.6 Blackout’s heavy, high-BC projectiles.

Frequently Asked Questions

What advantage does 8.6 Blackout have over .300 Blackout? It uses a larger .338-caliber projectile while still performing well from short barrels and suppressing effectively.

Does the brace fold for storage? Yes, the black polymer SB Tactical brace folds to collapse the platform’s overall length.

Buy the CMMG Dissent Mk3, 8.6 Blackout

The larger, harder-hitting 8.6 Blackout cartridge on CMMG’s compact AR10-sized Dissent Mk3 platform is exactly what this CMMG Dissent Mk3 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.