CMMG ENDEAVOR, Mk4, 5.56x45MM NATO, 18″

ENDEAVOR, Mk4, 5.56x45MM NATO, 18″

There’s a world of options when it comes to AR15s, and for those that want to reach out to further targets or hunt with 5.56, the 18-inch ENDEAVOR® Mk4 chambered in 5.56x45mm is an awesome choice. Despite all the different caliber offerings available today for AR15 pattern rifles, 5.56x45mm still stands as one of the most popular.

Built on our Mk4 – AR15 platform, this ENDEAVOR can make use of just about any AR15 compatible component, like custom trigger groups, and utilizes a nitride-finished 18-inch 416 stainless steel barrel for enhanced ballistic performance.

Each CMMG® ENDEAVOR rifle is purpose-built for long-range performance, with everything from the Magpul® MOE® rifle stock to the ZEROED™ muzzle brake, and every part in between selected for its utility to the avid marksman.

The EML™ 15 handguard maximizes customization potential. M-LOK® attachment slots at the 12, 3, 6, and 9 o’clock positions give you plenty of real estate to mount accessories, while the Picatinny rail sections allow for easy and solid mounting points for sights and accessories.

ZEROED parts and accessories – Quality comes standard

The AR15 platform is well known for its capability for customization but picking the right parts doesn’t have to be a nightmare of homework. CMMG’s ZEROED parts and accessories are made here in the USA with quality and attention to detail that is second to none and each ENDEAVOR comes equipped with a slew of ZEROED parts standard, including:

ZEROED Pistol Grip

ZEROED Trigger Guard

ZEROED 60°/90° Ambi Safety

ZEROED AR15 Ambi Charging Handle

ZEROED Ambi Mag Catch

ZEROED Extended Mag Release Button

ZEROED AR15 Bolt Catch

ZEROED AR15 Polymer Dust Cover

ZEROED Muzzle Brake 5.56mm

Lifetime Quality Guarantee

We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.

~Firearms shipping to states with magazine capacity restrictions will only ship with 10rd magazines in place of standard capacity magazines. CMMG does not address any other state compliancy requirements for further restricted states.