CMMG Resolute MK4 300 AAC Blackout 16.1in Carbine

The CMMG Resolute MK4 is a carbine-length AR built on CMMG’s Mk4 platform and configured for .300 AAC Blackout. It ships with CMMG’s ZEROED parts and the RipStock for functional adjustability. The EML15 M-LOK handguard provides modular attachment points while the rifle’s build emphasizes a balance of durability and weight for practical field use.

Key Specifications

• The rifle is chambered in .300 AAC Blackout.
• The barrel measures 16.1 inches for carbine-length handling.
• The barrel has a twist rate of 1:7.
• The action is Semi-Auto.
• The barrel material is 4140CM SBN.
• The muzzle device is a CMMG Zeroed Muzzle Brake.
• The upper receiver is Billet 6061 T6 aluminum.
• The lower receiver is Mk4 forged 7075 T6 aluminum.
• The handguard is the CMMG EML15 M-LOK with M-LOK slots.
• The unloaded weight is approximately 6.2 lbs with an overall length of 32.5 inches.

Built for shooters who value a practical, adaptable AR platform, the Resolute MK4 delivers CMMG’s suite of ZEROED components and features that support suppressed and supersonic .300 AAC Blackout use. Its combination of billet and forged receivers, a purpose-contoured barrel, and an ergonomic RipStock make it a reliable choice for a wide range of applications where modularity and dependable function matter.

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