The CMMG Endeavor Mk3 is a semi-auto, long-range rifle constructed on the AR-10 platform and capable of long-distance accuracy. The rifle is chambered in 6.5 Creedmoor or .308 Win. The 6.5 Creedmoor has a flatter course and less recoil than the .308 Winchester, so it's better for longer distances. The Endeavor is built on the more robust Mk3 (LR-308/DPMS Gen 1 high-pattern) receiver frame, which can easily handle the 6.5 Creedmoor. Fixed-position stocks, aircraft-grade aluminum receivers, M-Lok free-float handguards, Cerakote finishes, barrel lengths ranging from 20 to 24 inches, ZEROED pistol grips, ambidextrous safety, extended magazine catches, and CMMG's Lifetime Quality Guarantee are all included as the standard features. The Mk3 is compatible with Magpul AR-10 PMAGs. The felt recoil to the shooter is significantly reduced by the upper receiver's barrel, which has a threaded muzzle brake. The M-LOK attachment catches on the EML 15 handguard increase customizing options. Even with a huge optic attached, operating the bolt is simple because of the ZEROED's ambidextrous charging handle. This Mk3 AR-10 is designed for accuracy and rigorous use.