Forged 7075-T6 aluminum built to M16/M4 specs with M4 feed ramps. Standard Picatinny rail on top perfect for accepting most common optics. Matte Black hard coat anodized for supreme corrosion resistance. Comes with a forward assist and the dust cover assembly, but it is not installed. Accepts all standard AR-15/M16 components. Perfect for any AR build in 5.56, 300 Blackout, 9mm, and more! All parts are included but not installed.