CMMG Endeavor Mk3 | 6.5 Creedmoor | 20″ Barrel

The CMMG Endeavor Mk3 in 6.5 Creedmoor is a purpose-built AR-platform rifle optimized for long-range applications. It ships on the larger Mk3 (LR-308/DPMS Gen 1 high-pattern) billet receiver platform and features a 20-inch 416SS SBN barrel with a 1:8 twist to stabilize modern long-range bullets. For a matched optic under $1,000, consider a Vortex Viper PST Gen II 5-25×50, which pairs well with this rifle’s long-range capability and magnification needs.

Product Specifications

• The caliber is 6.5 Creedmoor.
• The barrel measures 20 inches and uses a 1:8 twist rate.
• The barrel material is 416SS SBN with a MT contour.
• The muzzle device is a CMMG ZEROED Muzzle Brake with 5/8 x 24 threads.
• The operating system is Direct Impingement.
• The upper receiver is billet 7075 T6 aluminum.
• The lower receiver is Mk3 billet 7075 T6 aluminum.
• The handguard is a CMMG EML15 M-LOK with M-LOK slots at 12, 3, 6 and 9 o’clock.
• The gas block is 0.750 non-adjustable with the gas port located at rifle.
• The trigger is a ZEROED drop-in unit and the trigger guard is integrated.
• The stock is a Magpul MOE rifle stock with an A1 receiver extension.
• The rifle includes a Magpul 20rd PMAG magazine.
• The charging handle is a CMMG ZEROED ambidextrous model and the pistol grip is a CMMG ZEROED grip.
• The safety selector is a CMMG ZEROED 60/90 degree unit.
• The UPC is 810144729152.

Designed for precision at extended ranges, the Endeavor Mk3 delivers a stable shooting platform with a stout receiver, an M-LOK handguard for accessory mounting, and components selected for repeatable accuracy. Its configuration supports hunting and competitive long-range shooting where trajectory, wind performance and follow-up shot control matter.

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