Buckaroo Lou,
I am responding based on the lengthy conversation we had back in '16 about what is and isn't a USFA USA firearm.
I agree with you on --- wrong sight shape; the ejector camming is short; and the flutes look long. The loading gate arm looks long and slim like a Uberti, also. The only thing that I could add to your comments would be the SN that I had decided on, that would be the lowest, I would go too, for a Real USFA. I set that at 22,4XX. I interpreted Yahoody's SN table that 22,2XX and above is a rough starting point for full USA guns. I take his listings of 22,18X and below as most likely Uberti's parts or mixes.
Therefore, I think I would call this a Uberti parts firearm. And even if it were a USFA USA not worth $6000.
But it is a very nicely worked and finished handgun.