Description
CMMG Upper Receiver Assembly, Mk4
This product is discontinued, a great alternative is: Assembled M4 Upper Receiver with Port Door and Forward Assist
This mil-spec M4 style upper receiver includes an installed forward assist and dust cover. Made from forged 7075-T6 aluminum, the assembly has a type III hard anodized finish and M4 feed ramps.
Have us engrave your port door and/or upper receiver. Choose your graphics from the drop down menus.
