The CMMG Forward Assist Upper Receiver Assembly is a vital component for those building their own Mk4/AR15 rifle. Its Cerakote finish not only enhances the durability but also ensures the receiver assembly maintains a clean appearance and withstands corrosion. This is crafted from a forged upper receiver that provides a reliable, mil-spec foundation for any upper build. With a standard ejection port configuration, this assembly is ideally optimized for traditional rifle-caliber applications.