I suppose my thinking here is based on the idea that I don't believe there is any government agency that TRULY has general confiscation of firearms as its goal. (There! I said it!
)
Without a prime directive that says, "we seek to identify, find, and confiscate all firearms" there is no reason at all to actively pursue such a thing. Doing so would suck up massive resources and get tons of notice.
Further, if they did, it wouldn't be a secret. Not with the sort of nation-wide effort it would take to even begin to locate the vast number of firearms that haven't been tracked -- ever -- or have wandered far from whatever was written on the old yellowed 4473 in some dealer's back room filing cabinet, etc. If there was such an effort to collate that information, we'd have heard about it 100 time by now. It would take thousands, at least, of agents to even get a meaningful start on a project like that. Agents who'd be operating in contact with hundreds of thousands of people in a directly unlawful way. It would be more than a few knowing winks and conspiratorial whispers here and there.
Having said that, I can't rule out some form of modern day electronic recording of 4473s, for example, that -- as institutions go electronic -- happen sometimes without even being intended. (For example, finding out that data has been dumped into hard drives instead of being wiped as required. It happens. Not always because of some nefarious purpose. I've seen similar things happen at my own firm and suddenly you've got many gigabytes of totally useless crap you never intended to record.) Or that at some point various electronic search technology will (or even does now) exist that could scour the bazillions of records and transmissions of all types and would be able to somehow make useful gun tracking data out of it all. And, we all have heard how our spy agencies "listen" to every word (actually more that they have computers scanning transmissions trying to grab key words or phrases related to terrorism and such) -- so it could be some day possible to turn that against American gun owners.
But even so, the fight is NOW, in the legislatures and the courts -- and we've been on the winning side for the last 20 years. Keep that up and we don't have to worry that someday a tyrannical leader will co-opt the NSA to track down your Mosin-Nagant pictures from 2013 and come raid your house.