CMMG Inc Receiver End Plate MK4. One of the most prominent aspects of a firearm is the receiver end plate. The CMMG Inc MK4 Receiver End Plate is made from steel to ensure a rugged and trustworthy product. Building some of the most reliable rifles on the market is nearly impossible without quality components such as the CMMG Inc MK4 Receiver End Plate. Stop settling for cheap add-ons and grab a quality part that will properly install on your rifle. Specifications for CMMG Inc MK4 Receiver End Plate: Manufacturer: CMMG Gun Model: CMMG Mk4 Package Contents: CMMG Inc MK4 Receiver End Plate What firearm models does the manufacturer say CMMG Inc MK4 Receiver End Plate is compatible with? The manufacturer says that CMMG Inc MK4 Receiver End Plate is compatible with CMMG Mk4CMMG Inc 55CA9DD: Receiver End PlateMK4