Historically speaking, firearm registration invariably leads to firearm confiscation – the only significant variable is time.
This was true in Canada:
Ten months after Rock’s remarks, Parliament passed the Canadian Firearms Act, and confiscating legally owned firearms is precisely the first thing the new law did. The first of three major provisions to go into effect banned private ownership of well more than half of Canada’s legally registered pistols. Any handgun of .32 [...]