system
A chat on subreddit /r/NoStupidQuestions
human
I owned a handgun for about ten years, then I sold it. 

There is absolutely no government record, of any sort, that I ever had that gun. And no laws were broken at all. 

Is that something that’s legally possible there?
gpt
In Austria it's not legally possible. You would have to register it in the ZWR (central weapons register) but you have 6 weeks to do so. 
But if you do it all in private there would be no one checkng if you have your gun or if you sold it to a friend or something.