This billet machined 7075-T6 aircraft aluminum alloy POF G4 .308 upper receiver has a match grade 16.5" deep fluted barrel, 11" modular rail, NP3 finish, short-stroke gas piston system, nickel plated bolt carrier, integrated bolt carrier key, POF-USA roller cam pin, chrome plated bolt, POF-USA modular railed receiver, free-floating monolithic rail system, black anodized billet charging handle, and a POF-USA free-floating modular "M" rail aluminum handguard.