The CMMG Resolute Mk4 is built around the 300 BLK cartridge and optimized for short-barrel, suppressed, and close-quarters applications. Designed to use common M4/AR15 components, this carbine-length rifle is suitable for range use, suppressed shooting, and home defense scenarios where compact handling and 300 BLK performance are desired.

The Resolute Mk4 is fitted with an EML 15 handguard that provides M-LOK attachment slots at the 3, 6, and 9 o’clock positions as well as a top M-LOK section between picatinny rail segments. It ships with a ZEROED SVD brake that is pinned and welded to the 14.5″ barrel, bringing the overall barrel length to 16.1″. The rifle includes a RIPSTOCK and a Magpul 30rd PMAG for immediate use.

Key Specifications

The caliber is 300 BLK.
The barrel length is 14.5 inches (pinned and welded to 16.1 inches overall).
The platform is Mk4 AR15.
The handguard is EML 15 with M-LOK attachment slots.
The included muzzle device is a ZEROED SVD Brake pinned and welded.
The rifle includes ZEROED parts including pistol grip, drop-in trigger, 60/90 degree ambi safety, ambi mag catch, extended mag release, polymer dust cover, and ambi charging handle.
The rifle includes an Magpul 30rd PMAG.
The finish is coyote tan.
The stock is a RIPSTOCK.
The magazine capacity is 30 rounds.

For a compact, purpose-built 300 BLK AR15, buy the CMMG Resolute Mk4 300 BLK online today and add a versatile carbine to your collection that balances short-barrel maneuverability with 300 BLK performance.