Skip to main content.
0 Item In Your Cart
Qty. Item Price
Cart Total $0.00

Continue Shopping


Endeavor 100 Rifle
Mk4, .224 Valkyrie


This product requires an FFL Provider to complete transaction. Click to select from a list of providers. If you don't see the FFL Provider you're looking for, enter the Name, Address, and Phone Number of your preferred provider.

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 100 Rifle, Mk4, 224 Valkyrie

The 100 Series features classic furniture appointments such as the beloved A2 pistol grip. Chambered in 5.56x45mm, this AR is ready for the range.

The Mk4 platform accepts standard AR15-style magazines, and is the most versatile of the CMMG platforms, especially with the .22 LR, 5.7x28mm (Conversion), and 9mm conversions.

CMMG’s ENDEAVOR designated marksman and distance rifle lineup is designed for superior long-range accuracy, 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.

All Products come with CMMG’s Lifetime Quality Guarantee.

Technical Specifications

Platform Mk4
Caliber .224 Valkyrie
Barrel Length 20
Barrel Twist 1:07
Barrel Contour MT
Barrel Material 416SS, SBN
Barrel Twist 1:07
Muzzle Device A2 Comp
Muzzle Thread 1/2 X 28
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 CMMG A2
Receiver Extension CMMG A1 Extension
Stock / Brace CMMG A1 Fixed Stock
Trigger Type Mil-Spec Single Stage
Trigger Guard CMMG Mil-Spec
Safety Selector CMMG Mil-Spec
Magazine 224 Valkyrie/22 Nosler/6.8SPC. 10rd
Weight 7.6

Top Sellers


Select a FFL Provider

Store Locator is loading from Storemapper plugin...