This POF G4 415 upper receiver made from CNC machined 7075-T6 aircraft aluminum alloy has a match grade 10.5" deep fluted barrel, 9" modular rail, black anodized finish, nickel plated bolt carrier with integrated bolt carrier key, chrome plated bolt, POF-USA roller cam pin, POF-USA modular railed receiver, free-floating monolithic rail system, black anodized billet charging handle, and a POF-USA free-floating modular, aluminum handguard.