Texas Gun trade ?

The NRA had a law passed that there could be no national nor electronic databases of gun ownership, transfer, etc.  Instead there are many piles of paper at different gun shops and a few centralized collection sites.  Unless you are a police department investigating a crime, you probably can't tell.  https://giffords.org/lawcenter/gun-laws/policy-areas/gun-sales/maintaining-records/

check the serial#

The sale of all weapons should be licensed and registered 

check the serial#