CMMG MK4 Lower Receiver Assembly, Midnight Bronze

CMMG MK4 Lower Receiver Assembly

The foundation of any quality AR15 build starts with a precision lower receiver, and CMMG delivers exactly that with this MK4 lower receiver assembly in Midnight Bronze.

What You Get

This is a fully assembled lower receiver—the regulated firearm component that serves as the heart of your AR15 platform rifle. CMMG has engineered this unit to exacting standards, ensuring proper tolerances and reliable function with standard AR15 upper receivers.

Design and Finish

The Midnight Bronze finish provides a modern aesthetic while offering corrosion resistance. The anodized aluminum construction is lightweight yet durable, designed to withstand the rigors of shooting sports and field use.

Compatibility

This MK4 lower receiver is compatible with standard AR15 upper receivers and components. Whether you're building a precision rifle, a tactical platform, or a recreational shooter, this lower provides a solid foundation.

Why CMMG

CMMG has earned a reputation for quality manufacturing and attention to detail. Their lower receivers are known for tight tolerances and reliable performance, making them a trusted choice for builders and shooters alike.

Next Steps

Pair this lower receiver with your choice of upper receiver, bolt carrier group, and furniture to complete your AR15 build.