You are in part, doing yourself a big favor by doing a BGC on a sale.
You sell to a felon, and this is bad ju ju
As far as the gun make model and SER##
If you are buying, and the gun turns out to be hot, that's also bummer, especially if you decide to sell it later, and it then ends up heading to a police prop room as a stolen gun.
You will likely be out your $$$
There are some good things in this stuff, but sadly these laws can be perverted dreadfully
Snowy
Its the mandatory part and the behind the scenes registration that people object to !