Just a couple thoughts:
Comment: If we really MUST suffer the indignity and infringement of a background check for simple possession or carry of legal, constitutionally protected tools, it would surely be best that it concern the person alone, and not be linked to any particular gun as most systems currently do.
Question: How would it be envisioned that such a system protect against abuse of privacy if everyone can run checks against anyone?
Concern: In funding, constructing, and implementing such a system, you may be opening the door to the next natural step: mandatory checks for all private sales. When the gun grabbers next propose that, it would no longer entail all those prohibiting costs and development (already in place through this initiative) but simply the official decree to complete the circle of universal registration.