CMMG Gun Builders Lower Parts Kit for Mil-Spec 308 AR-10/MK3 Black 38CA61A

The CMMG Gun Builders Lower Parts Kit .308 AR-10/MK3 is a purpose-built solution for assembling a .308/AR-10 platform lower receiver while maintaining full control over key upgraded components. Designed for compatibility with CMMGs MK3 platform and other Mil-Spec .308 lowers, this kit provides the essential internal parts needed for a reliable and precise build.

Each component is manufactured to meet or exceed Mil-Spec standards, ensuring proper fit, smooth operation, and long-term durability. The kit is ideal for builders who want a dependable foundation without being locked into factory-selected upgrades.

To allow for customization, the kit does not include the fire control group, pistol grip, or trigger guard, giving users the flexibility to select preferred components tailored to their shooting style and performance needs.

Finished in black and proudly made in the USA, the CMMG Gun Builders Lower Parts Kit delivers a high-quality, no-nonsense starting point for building a dependable and fully customized .308 AR platform.

Specifications