The instant check. There are two different ways it is done. Some states go through NICS, and it's Federal. Some states, like Florida, do it in-house. Our call-in goes to the FDLE.
I have stood there and LISTENED to the call-in. For a while I stood behind the counter and MADE the call-in. There is no information given that would help for registration.
We'd tell them "John Smith, white male, US citizen, does not wish to give his SSN", and then they would ask "Handgun or long gun".
We'd say HANDGUN. We would not say SMITH AND WESSON MODEL 36, and we certainly would not say SMITH AND WESSON MODEL 36, SERIAL NUMBER 12345. Just HANDGUN. If you were buying two pistols, or ten pistols, we still just said HANDGUN. There was another form that had to be filled out, but we never told FDLE it was a multiple purchase. If you were buying thirty rifles, we just said LONG GUN, and there was not even an extra form for that.
I have no experience with a call-in to NICS. Do they tell them what make and model and serial number the gun is? Do they tell them how many guns you are buying?
Because, if not, all they know is that John Smith bought a pistol. So even if they DON'T erase the info, like they are legally required to do, they don't have enough to do anything.