Never content to settle on the mil-spec, Faxon manufactured enhancements directly into the receiver: The receiver is trued by Faxon at the factory Faxon hone the inside bore to smooth out the action of the bolt carrier group. Hollow-out the shell deflector to reduce weight and look great Manually engraved T-marks on the upper. Will stay visible after any coating Hold tighter tolerance on the lugs for a better fit Faxon Firearms Forged Upper Receivers are available stripped and complete with forward assist and ejection port cover. Specifications: Material: 7075-T6 Forged Aluminum Finish: Type III Hard Coat Anodizing Caliber Co Mfg: Faxon Firearms