The CMMG MK4/AR15 lower receiver assembly (brand part no. 55CA102CT) gives builders a lower sized for CMMG’s MK4 platform in a Coyote Tan finish, matching the tan furniture and coatings common on CMMG’s own rifle lineup. CMMG designs the MK4 lower to work as the foundation for an AR-15-pattern build, keeping compatibility with the parts and accessories built around that platform. The Coyote Tan finish gives builders an easy match if they’re pairing this lower with CMMG uppers, handguards, or stocks already finished in that color. Among the lowers in the AR15 lowers category, this CMMG assembly is a straightforward option for builders standardizing on CMMG’s MK4 platform.

Key Specifications

• This lower is sized for CMMG’s MK4/AR15 platform.
• The finish is Coyote Tan, matching CMMG’s tan-finished furniture and uppers.
• It ships as a receiver assembly, ready to build around the CMMG MK4 ecosystem.
• Forged from 7075-T6 aluminum for a durable, mil-spec-pattern foundation.
• Finished in Type III hard-coat anodizing beneath the Coyote Tan Cerakote for wear resistance.

Frequently Asked Questions

What platform is this lower built for? It’s sized for CMMG’s MK4/AR15 platform.

What color is this lower? It comes finished in Coyote Tan.

Buy the CMMG MK4/AR15 Lower Receiver Assembly, Coyote Tan

A Coyote Tan finish makes this MK4/AR15 lower an easy match for a build standardizing on CMMG’s tan-finished parts. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.