CMMG Endeavor 20" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail – Rifle-Length with BCG and CH – Tungsten – 28B3D0CTNG

While 5.56x45mm has long been trusted, the .22 ARC introduces the high-performance capabilities of the .22-250 caliber to the lightweight AR-15 (MK4) platform. The ENDEAVOR MK4 upper group, featuring a 20 inches barrel, ensures it extracts all the ballistic performance you need. Each ENDEAVOR upper group is meticulously assembled and includes the essential bolt carrier group along with a thoughtfully curated selection of parts and accessories, providing comprehensive functionality and customization options.