The CMMG, Ejection Port Cover Kit, fits the CMMG Mk3 Ejection Port as well as the LR-308 pattern uppers. Comes with usa made Rod, and Spring, Black mag phos Finish. All CMMG parts are made in the United States from the best materials available. CMMG guarantees its products against defects in material or workmanship for the life of the product. perfect

Includes Mk3 ejection port cover, rod, and spring.