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Endeavor 200 Rifle
Mk4, 6mm ARC


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CMMG is temporarily halting the sale of complete firearms, upper receiver groups, lower receiver groups, and Radial Delayed Blowback BCG kits on our website in order to focus on outstanding orders. We apologize for the inconvenience and appreciate your patience as we traverse this extremely busy time. Sign up for notifications on your favorite products to get notified when they become available again or find a local dealer on our dealer page.

Endeavor 200 Rifle, Mk4, 6mm ARC

If you are looking for a feature rich AR platform rifle, the ENDEAVOR 200 Series is for you. The 200 Series features upgraded furniture appointments from the 100 series such as the Magpul MOE pistol grip, Magpul MOE rifle stock, and CMMG SV muzzle brake.

CMMG’s ENDEAVOR designated marksman and distance rifle lineup is designed for superior performance, this ENDEAVOR 200 rifle chambered in 6mm ARC 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.

Technical Specifications

Platform Mk4
Caliber 6mm ARC
Barrel Length 20
Barrel Twist 01:07.5
Barrel Contour MT
Barrel Material 416SS, SBN
Barrel Twist 01:07.5
Muzzle Device CMMG SV Brake
Muzzle Thread 5/8 X 24
Gas Port Location Rifle
Gas Block 0.750 Non-Adjustable
Upper Receiver Forged 7075-T6 AL M4 type upper
Lower Receiver AR15
Hand Guard CMMG RML15 M-LOK
Finish Hard Coat Anodized Receivers and Hand Guard (Can be upgraded to Cerakote)
Charging Handle CMMG Mil-Spec
Pistol Grip Magpul MOE
Receiver Extension CMMG A1 Extension
Stock / Brace Magpul MOE Rifle Stock
Trigger Type Mil-Spec Single Stage
Trigger Guard Magpul MOE
Safety Selector CMMG Mil-Spec
Magazine 10rd
Weight 7.9

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