CMMG Endeavor 20" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail – Rifle-Length with BCG and CH – Titanium – 28B3D0CTI

While 5.56x45mm remains a reliable choice, the .22 ARC brings the potent performance of the 22-250 caliber to the lighter-weight AR-15 (MK4) platform. The ENDEAVOR MK4 upper group, equipped with a 20 inches barrel, ensures exceptional ballistic performance tailored to your requirements. Each ENDEAVOR upper group is meticulously crafted and includes the essential bolt carrier group along with a meticulously chosen assortment of parts and accessories, providing comprehensive functionality and customization options.