I have an upper I'm looking to move if you'd be interested. I don't have the wrench to take the barrel nut off to part it out. Aero upper, Core 13.9, geiselle mk 8 13" DDG, badger TDX gas block, BCM carrier with headspaced bolt. It has a yankee hill FH on it that I could take off if you didn't need it. Currently has a ACOG TA31f with a kram 7.0 on it that I would sell with it or separately.