CMMG Endeavor 20" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail – Rifle-Length with BCG and CH – Coyote Tan – 28B3D0CCT

While 5.56x45mm remains a proven standard, the .22 ARC introduces the robust performance of the 22-250 caliber to the lightweight AR-15 (MK4) platform. The ENDEAVOR MK4 upper group, equipped with a 20 inches barrel, maximizes ballistic performance to meet your exacting needs. Each ENDEAVOR upper group is complete with a bolt carrier group and a meticulously chosen selection of parts and accessories, ensuring comprehensive functionality and customization options.