CMMG Endeavor Mk4 5.56 18in Armor Black | 5.56x45mm

The CMMG ENDEAVOR Mk4 is an AR-15 platform rifle chambered in 5.56x45mm and built on CMMG’s Mk4 architecture with an 18-inch nitride-finished 416 stainless steel barrel for enhanced ballistic performance. It is configured with a Magpul MOE rifle stock, CMMG ZEROED controls, and a CMMG EML15 M-LOK handguard to support accessories and optics. For a practical optic under $1,000 that complements the rifle’s effective range and versatile role, consider the Vortex Strike Eagle 1-6×24 as a low- to mid-range solution.

Product Specifications

• The operating system is Direct Impingement.
• The caliber is 5.56x45mm.
• The barrel measures 18 inches and is nitride-finished.
• The barrel material is 416SS SBN.
• The barrel twist rate is 1:7.
• The muzzle device is a CMMG ZEROED Muzzle Brake.
• The muzzle thread is 1/2 x 28.
• The gas block is 0.750 Non-Adjustable.
• The upper receiver is Billet 6061 T6 Aluminum.
• The lower receiver is Mk4 Forged 7075 T6 Aluminum.
• The handguard is a CMMG EML15 M-LOK with Picatinny sections.
• The stock/brace is a Magpul MOE Rifle Stock.
• The magazine is a Magpul 30rd PMAG.
• The weight is 7 lbs.
• The UPC is 810144722832.

This Endeavor Mk4 is set up for accuracy and modularity: the 18-inch 416SS barrel and Mk4 receiver configuration support longer-range work and adaptable component choices. The EML15 handguard provides M-LOK attachment points and Picatinny sections for optics and accessories, while ZEROED controls and a 30-round PMAG supply straightforward, practical operation. Suited applications include precision target work and hunting with 5.56x45mm where a balance of reach and handling matters.

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