CMMG Endeavor Mk4 AR-15 Upper Receiver Assembly 22 ARC 20" Barrel (Includes M-LOK Handguard, 1:7 Twist)

This CMMG AR-15 Endeavor Mk4 Upper Receiver Assembly is designed to pair with any standard AR15 pattern lower group. Long-range rifle builds don’t have to be cumbersome, with a barrel length of 20” this ENDEAVOR Mk4 Upper Group balances maneuverability with the performance shooters have come to expect from the ENDEAVOR line. Harness the capability of 22 ARC in this uniquely designed Endeavor upper. Available in seven different Cerakote finishes, all CMMG Upper Groups come complete with bolt carrier group and ZEROED accessories. The 22 ARC is the result of careful and meticulous design, following the same proven methodology as the highly acclaimed 6mm ARC. The cartridge and chamber were designed concurrently by Hornady to ensure consistent and repeatable function while producing 22-250 performance from the AR-15 platform. 22 ARC barrels feature an optimal 1:7 twist rate to better stabilize the heaviest 22 caliber bullets. Features ZEROED AR15 Polymer Dust Cover ZEROED AR15 Ambi Charging Handle ZEROED Muzzle Brake