GNGICS

Edit to add:  If we MUST have a background check to make sure people are allowed to have guns, this is what I propose.

The Go-No-Go-Instant-Check-System I have envisioned is simple.

It's a list of the disqualified.  Edit to add: Names and unique ID number since there's so damn many people named Smith and Patel.  Never mind Gonzales...

Put in a name that's not on the list, it returns a "GO!" response.

Put in a name that's on the list, it returns a "NO GO!" response.

And that's all it needs to do.

Then make it accessible to anyone.

Optionally it can keep some stats of responses given and whether or not to report that a forbidden person to the cops.

I'd keep it mandatory for an FFL to use it to make a sale, and optional for private sales.

Notice that I'm not recording what was sold, where it was sold or mandating any record keeping on the part of the buyer or seller.

I think this is as anonymous as you can make a system that checks to see if someone is prohibited.

I think I would also indemnify a seller who uses the system and gets a "GO!" response from being prosecuted for selling a gun to a prohibited person.  That'd encourage its use by private sellers.

Another option is adding a subroutine for NFA stuff.  With a valid "GO!" you can then enter the serial number of your item and pay the taxes.

Once the system is up, I'd also require that all 4473's be destroyed.  The trace system has proven useless since it was implemented and is a greater danger to the citizens than a boon.