Optimize your AR-15 assembly with the CMMG 55CA601 LPK 556 Lower Parts Kit, a high-quality selection excluding commonly upgraded components for enhanced customization. This comprehensive gun builders kit includes all essential parts required to complete your lower group, ensuring compatibility and reliability for your firearm projects. Crafted to meet military specifications, it is ideal for both builds and repairs. All parts meet or exceed mil-spec For builds or repairs Compatible with AR-15 builds Elevate your firearm performance with precision-engineered components.