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 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.
|Barrel Material||416SS, SBN|
|Muzzle Device||CMMG SV Brake|
|Muzzle Thread||5/8 X 24|
|Gas Port Location||Rifle|
|Gas Block||SLR Adjustable 0.750|
|Upper Receiver||7075-T6 AL M4 Type Upper|
|Hand Guard||CMMG RML15 M-LOK|
|Finish||Cerakote Receivers, Handguard, RipStock|
|Charging Handle||CMMG ZEROED Ambi Charging Handle AR15|
|Pistol Grip||Magpul MOE|
|Receiver Extension||CMMG A1 Extension|
|Stock / Brace||Magpul PRS|
|Trigger Type||Geissele Automatics SSA 2-Stage|
|Trigger Guard||Integrated Into Lower|
|Safety Selector||CMMG Ambi|