You need to study gun laws. In the left coast registering gun sales between individuals may be required but not in the rest of the world, especially Texas.
Yeah, I know about Texas. Left there many years ago. Never went back except to drive thru on I40 or fly thru DFW. I've heard the 'Everything is done bigger & better in Texas' story way too many times
But before you start another 'left' coast comment, let me say I don't like CA either. It was relatively a not-so-bad place 30 years ago when I came out here after NASA shot it's wad with the Challenger accident and I was left holding a pink slip.
I'm close to retirement now and we're bailing from CA just as quick as we can after that. Where to unknown at this time but definitely not the Houston area from whence I came west back then. I do like Dallas area and it's not too far from my mom's place in Arkansas.
And WRT gun laws, I simply stated what I have heard people talk about around here. I only own 1 firearm and it is registered so no problem there. The point I was making is I doubt there is any traceability in MOST private firearms sales regardless of state.