I own (or used to own) a whole bunch of firearms that were legally purchased from a licensed gun dealer. Some of said dealers are now out of business, meaning no three ring binders to go thru. A while back, when I was still working and had computer access, I tried to track down one of my handguns by serial number. Nothing, nada, zip...

Here's why I asked the question in the first place:

On the President's agenda as stated on:

http://www.whitehouse.gov/agenda/urban_policy/

"PHRASECENSOREDPOSTERSHOULDKNOWBETTER. and Biden would repeal the Tiahrt Amendment, which restricts the ability of local law enforcement to access important gun trace information, and give police officers across the nation the tools they need to solve gun crimes and fight the illegal arms trade. PHRASECENSOREDPOSTERSHOULDKNOWBETTER. and Biden also favor commonsense measures that respect the Second Amendment rights of gun owners, while keeping guns away from children and from criminals. They support closing the gun show loophole and making guns in this country childproof. They also support making the expired federal Assault Weapons Ban permanent."

(I added bold to point out the part most relevant to the topic.)