CMMG is one of the top companies in the AR-15 game. With the CMMG AR-15 complete lower receiver parts kit, you will get everything you need to finish off your stripped lower receiver. Sets of parts are separated into color-coded bags and come along with directions to make assembly easy, even for beginners. Don't settle for a lesser quality parts kit that might fail at any time, the CMMG lower parts kit is ready for the toughest conditions.