CMMG Resolute Mk4 338 ARC 16.10" 1:8 Twist Complete Upper

The CMMG Resolute Mk4 complete upper group brings the 338 ARC cartridge to the AR-15 platform in a turnkey package ready to drop onto any mil-spec lower.

At the heart of this Resolute Mk4 is a 16.10" barrel finished in Black Nitride for excellent wear and corrosion resistance. The barrel is cut with a 1:8" twist and uses a 1.13" gas block journal.

The aluminum upper receiver is coated in Black Armor Cerakote, giving the upper a tough, low-reflectivity finish that holds up to hard field use. CMMG outfits this upper with the EML 15 handguard, a slim, lightweight design that delivers plenty of rail real estate for lights, lasers, bipods, or other accessories. The result is a complete upper ready to pair with any mil-spec AR-15 lower. (Lower receiver, lower parts kit, stock, and pistol grip not included.)