CMMG Resolute Mk4 .300 BLK 14.5″ 30A240AAB

The CMMG Resolute Mk4 is a carbine-length AR platform chambered in .300 BLK designed to deliver the cartridge’s short- to mid-range ballistics in a compact rifle package. It features a 14.5″ barrel fitted with a ZEROED SVD muzzle brake that has been pinned and welded, producing an overall barrel length of 16.1″ while remaining configured as a rifle. The rifle ships with a Magpul 30-round PMAG and CMMG’s suite of ZEROED controls and accessories for practical, ambidextrous operation. For a compatible optic under $1,000, a Vortex Strike Eagle 1-8×24 provides a versatile short- to mid-range sighting solution well suited to this platform.

Product Specifications

• Manufactured by CMMG.
• Model designation is Resolute Mk4.
• Manufacturer part number is 30A240AAB.
• Chambered in .300 BLK.
• The barrel measures 14.5 inches and is pinned and welded with the ZEROED SVD brake to a total length of 16.1 inches.
• The muzzle is threaded with a 5/8×24 pattern.
• Includes a Magpul PMAG with a 30-round capacity.
• Features the EML 15 handguard with M-LOK attachment slots.
• M-LOK slots are positioned at 3, 6, 9, and 12 o’clock with a reduced full-length top Picatinny section.
• Equipped with the RIPSTOCK for adjustable ergonomics.
• Includes ZEROED components such as a drop-in trigger, 60/90° ambi safety, ambi mag catch, extended mag release, ambi charging handle, and AR15 bolt catch.
• The finish is black.
• Built on the Mk4 AR-15 platform.
• UPC is 810103479753.

This Resolute Mk4 is engineered for shooters who want a compact rifle that maintains rifle-length legal status while delivering the .300 BLK cartridge’s performance. It balances maneuverability and ballistic capability for roles such as short- to mid-range shooting and suppressed subsonic applications, and its complete ZEROED accessory suite makes it ready for the range. The EML 15 handguard provides mounting options without excessive weight, and the included 30-round PMAG gives ample capacity for extended sessions.