CMMG Gun Builders Lower Kit AR-15 Black 55CA601

The CMMG Gun Builders Kit is a practical solution for AR-15 builders who want a high-quality foundation while retaining the flexibility to customize key components. Designed for assembling a lower receiver, this kit includes most of the essential parts needed to complete your lower groupmaking it ideal for both first-time builders and experienced enthusiasts. Does not include Trigger Guard, Fire Control Group and pistol grip.

All components in the kit are manufactured to meet or exceed Mil-Spec standards, ensuring reliable fit, function, and long-term durability. This makes the kit a dependable base for a wide range of AR-15 builds, from range rifles to defensive setups.

The Gun Builders Kit is intentionally configured to exclude commonly upgraded components, allowing users to select their preferred trigger system, grip, and trigger guard. This streamlined approach helps reduce unnecessary costs while giving you full control over the parts that matter most for performance and ergonomics.

Built with CMMGs reputation for quality and precision, the 55CA601 kit delivers a solid, no-nonsense starting point for building a reliable and customized AR-15 lower receiver.

Specifications