CMMG 33BFA0C-AB Banshee MK3 8.6Blackout 16.10" Black Armor Cerakote Receiver for AR-Platform

The CMMG 33BFA0C-AB Banshee MK3 8.6 Blackout 16.10" upper receiver assembly represents a purpose-built platform for shooters seeking subsonic rifle performance in a compact, AR-compatible form factor. Chambered in 8.6 Blackout—a cartridge engineered specifically for subsonic operation and sound suppressor optimization—this 16.10" barreled upper delivers consistent, predictable ballistics without the ballistic compromise typical of larger calibers operating below transonic velocities. The Black Armor Cerakote finish provides corrosion resistance and durability essential for field deployment and repeated use in demanding environments.

At 5.7 lbs and dimensioned for modular AR-platform integration, this upper receiver integrates seamlessly into existing M16/M4-pattern lower receivers and components. The 16.10" barrel length positions the Banshee MK3 in the CQB-to-intermediate-range envelope, balancing velocity retention with maneuverability in confined spaces—a critical consideration for tactical applications where barrel-dependent ballistic performance intersects with physical handling constraints. The 8.6 Blackout cartridge's inherent design favors suppressed fire, where heavy projectiles maintain subsonic velocities across practical engagement distances without relying on velocity reduction to maintain supersonic threshold compliance.

This upper receiver configuration serves operators, law enforcement specialists, and precision shooters who prioritize acoustic signature reduction, ammunition availability, and barrel-dependent terminal ballistics in suppressed rifle operations. The Banshee platform is also favored by precision shooting enthusiasts exploring subsonic rifle accuracy and by users seeking a versatile 8.6 Blackout upper that maintains full AR modularity for lower receiver compatibility and accessory configuration flexibility. CMMG's Banshee MK3 line has established a market position as a recognized reference platform for 8.6 Blackout execution, making this upper receiver a known quantity in both tactical procurement and civilian specialty rifle circles.