I believe a background check is being confused with gun registration. Gun registration should not be a part of a background check. A background check should deal only with a persons criminal and
possibly their medical records to insure that they are not prohibited to purchase or own a firearm. I'm not sure why everyone keeps tying these two together because they are totally two separate issues. You can run a BC without firearm information if it is set up that way. They do that here all the time to issue a CPP. I know because I've had one for 20+ years and it has been renewed many times. A FFL/NICS is not involved in that BC. They probably go to the NSA for that.
The NICS is also a BC. On that form they ask for the SN of the firearm but they shouldn't. By law they are supposed to purge the entire record of that check in 3 days. Do they, I have no idea, but by law they are supposed to. If the law were superseded in congress with a new one it should be void of any SN information. The ATF already has a record of where the firearm was shipped because the mfg has to log it out and the FFL has to log it in
and out. He has to keep a record of who he transferred the gun to. That's where the registry is if there is one. That's why the ATF keeps trying to scan the logs using the pretext that they are investigating someone. BS, they are trying to build a gun registry and many FFL's let them do it.
The fed and state are two different gov't entities and operate under different sets of statutes. Here the state AG sets the rules for a business license and if you want to do business as an FFL you are required to have the purchaser register the handgun. Bingo, they have a registry and that can be shared with the ATF or any other LEA.
Again, a BC doesn't have to be
and shouldn't be a registry. If the AG crowd wants a UBC then I say let them have one but before it happens they scrap the old NICS form and require only personal information on that check, not firearm information. And while they are writing the new legislation there should be attached language that deals specifically with property rights of gun owners like what is found here in WA I-591.
It is unlawful for any government agency to confiscate guns or other firearms from citizens without due process.