Guys,
I spoke with the FFL guy that I used to receive the old school (wood furniture) Mossberg 500A that I bought over the internet.
I raised this question with him, and was somewhat comforted by what he said.
I was under the impression that when I bought a gun either from a dealer here in Texas, or had it shipped to an FFL, then the information I provided to the dealer or FFL to run a background check on me provided information about the gun (and now me) to the FBI, BATF, NSA, TSA, CIA, or some such.
He said "absolutely not". When he runs the standard background check (through the FBI system I assume), that he provides no information regarding my purchase of a particular firearm. Yes, he is required to keep record of the transaction in his physical files (for 20 years), but some federal agency does not have information that would allow them to come to my door (during martial law or some other SHTF scenario), and say "where is the old school Mossberg 500A that you bought in January, 2014?"
He said the FBI system has no such capability, that it is basically background check only, and that it has no capability to track firearm sales to purchasers. The FBI/BATF/etc. COULD go get all of the files of all of the FFLs and look at/for guns+owners that way, but that scenario would be a logistical impossibility.
So... bottom line... I was relieved that no government system has record of any/all of the guns I may have purchased over the last 10 years. Not to mention the impossibility of tracking private sales between individuals, or those that have been handed down as gifts, etc.
So I'm trying to imagine a scenario where the 'law' comes to my door and has any knowledge of what firearms I possess. I suppose they could trump up some reason to search the house, or they could ask/demand "all firearms be turned in to your local authorities" but short of that they wouldn't be able to enforce any requirement to turn over the guns that anyone allegedly may have.
I'm sure states like New Yawk and Kaleefornya are much different. And we've seen how quickly and easily Boston Ma. residents "sheltered in place" and submitted to house to house searches, but, umm, don't think that's gonna happen anywhere but the northeast or way out west.