New and improved Palmetto State Armory PA10 Gen3 308 Upper receiver is fully assembled and ready-built into an upper assembly to your specifications! With streamlined styling, the new and improved PSA PA10 is here. The Gen3 model offers a more modern appearance and improved functionality. The upper receiver is machined from forged 7075-T6 Aluminum and hard coat anodized black for durability. Featuring a mil-spec finish, these uppers are made for us right here in the USA by a mil-spec manufacturer.