CMMG Inc Ejection Port Cover MK3. . Formulated by using some of the most extremely heavy duty and long lasting materials in existence these AR15 Upper Parts via CMMG will present you with a product that will give years of consistency. CMMG has been developing superior quality merchandise for a number of years and the CMMG Ejection Port Cover is their way of revealing just how much they care. Here at OpticsPlanet we ensure that it is our obligation to purchase the most suitable product for your specifications and exhibiting the CMMG Ejection Port Cover is a thing that we are pleased to offer. Specifications for CMMG Ejection Port Cover: Manufacturer: CMMG Color: Black Gun Type: Rifle Package Contents: CMMG Ejection Port Cover What firearm models does the manufacturer say CMMG Ejection Port Cover is compatible with? The manufacturer says that CMMG Ejection Port Cover is compatible with AR-15 CMMG Mk3CMMG Inc 38BA51C: Ejection Port CoverMK3