CMMG Resolute MK4 22 ARC 16.1" Complete Upper Group - Armor Black

The CMMG Resolute MK4 complete upper group brings the performance of 22 ARC to the AR-15 platform. This assembly is built around a 16.1" barrel machined from 4140CM steel with a 1:7 rate of twist and a salt bath nitride finish for long-lasting corrosion resistance.

The upper receiver is precision-machined from billet 6061 T6 aluminum and coated in a rugged Cerakote finish. A CMMG EML15 M-LOK handguard provides a slim, free-float platform for mounting accessories, while the rifle-length gas system uses an adjustable 0.750" gas block for reliable cycling across a wide range of ammunition.

User controls include a CMMG ZEROED ambidextrous charging handle and a matching ZEROED polymer dust cover. The muzzle is fitted with a CMMG ZEROED muzzle brake to help tame recoil. Weighing approximately 5.1 lbs with an overall length of 31.3", this upper group is designed to mate with any standard AR-15 lower receiver and delivers 22-250 Remington-class ballistic performance in a familiar semi-auto package.