CMMG Endeavor Mk4 5.56x45mm 18in

The CMMG Endeavor Mk4 is designed for shooters who need an AR-style rifle optimized for longer-range accuracy and modularity. Intended for range work, hunting, and precision shooting, this rifle brings a purpose-built Mk4 AR platform together with components chosen for utility and customization.

Built on CMMG's Mk4 AR platform, the rifle balances a durable build with user-focused ergonomics. The package includes an 18-inch 416 stainless steel barrel with a nitride finish, an EML15 M-LOK handguard for accessory mounting, and a Magpul MOE rifle stock for familiar shoulder geometry and handling.

Key Specifications

• The platform is Mk4.
• The caliber is 5.56x45mm.
• The operating system is direct impingement.
• The barrel length is 18 inches.
• The barrel twist is 1:7.
• The barrel material is 416 stainless steel and it features a nitride finish.
• The muzzle device is a CMMG ZEROED muzzle brake.
• The muzzle thread pattern is 1/2 x 28.
• The handguard is a CMMG EML15 M-LOK.
• The stock is a Magpul MOE rifle stock.

With a focus on modularity and long-range capability, the CMMG Endeavor Mk4 offers a reliable AR platform with components selected for practical performance. Buy the CMMG Endeavor Mk4 5.56x45mm online today as a versatile, build-friendly option for range use, hunting, or precision-oriented applications.