CMMG 34B440FAB Resolute Mk4 338 ARC 16.10" 1.13" Black Nitride Barrel Aluminum Black Armor Cerakote Receiver

Designed for those seeking the power of a large bore caliber in an AR-15 platform, the CMMG RESOLUTE Mk4 338 ARC Upper Receiver Group delivers superior energy on target with enhanced versatility. The 338 ARC is engineered to provide subsonic and supersonic performance similar to the 300 Blackout, but with greater impact and minimal gas system adjustments when transitioning between suppressed and unsuppressed configurations.Key Features:Optimized for 338 ARC - Balances power, versatility, and reliability in an AR-15 format.6.5 Grendel Bolt Compatibility - Uses the same bolt as 6.5 Grendel AR-15s, maximizing parts interchangeability.1:8 Twist Rate - Allows handloaders to utilize a wider range of traditional .338 caliber projectiles.Specifications:Platform: AR-15 (Mk4)Caliber: 338 ARCBarrel Length: 16.1Twist Rate: 1:8Compatibility: Uses 6.5 Grendel AR-15 bolt