Endeavor 300 Rifle, Mk4, 6mm ARC

If you want the best an AR has to offer, then the 300 Series is your choice in the Endeavor rifle lineup. This AR is fitted with every desired feature including a choice of 10 Premier Cerakote colors, laser engraved model name on the lower receiver, updated ambidextrous controls and sling points along with a Geissele Automatics SSA 2-stage trigger, Magpul MOE grip, Magpul PRS stock, SLR adjustable gas block, and CMMG SV muzzle brake. These are just a few of the possible upgrades on this series. Chambered in 6mm ARC, this AR is ready for the range.

CMMG’s ENDEAVOR designated marksman and distance rifle lineup is designed for superior performance, the ENDEAVOR line features a 20-inch barrel so that you can squeeze out every drop of ballistic performance from this exciting new caliber. Each rifle ships with one 10-round magazine.

Mk4 platform lower receivers accept standard AR15-style magazines, and are the most versatile of the CMMG platforms, especially when paired with the .22 LR, 5.7x28mm, and 9mm conversion magazines and the matching upper receiver group.

All CMMG products come with our Lifetime Quality Guarantee.