Description
The CMMG Resolute MK4 is a complete AR-15 upper receiver group chambered in 300 AAC Blackout, built around a 16.1″ barrel finished in Armor Black Cerakote. Designed for the CMMG Mk4 platform, this upper ships fully assembled but is sold without a bolt carrier group (BCG) or charging handle, allowing builders to pair it with their preferred components.
The Resolute MK4 features a free-float M-LOK handguard for accessory mounting and a barrel threaded 5/8×24 for standard 300 BLK muzzle device compatibility. The 300 AAC Blackout chambering makes this upper well-suited for suppressed shooting, hunting, and tactical applications, performing well with both supersonic and subsonic loads. The upper weighs approximately 4 lbs and ships in packaging measuring roughly 3.30 x 4.45 x 31.20 inches.
Note: This listing is for the assembled upper group only. BCG and charging handle are not included.
