There is, of course, however, an optimum level of control, and anything above that is futile, expensive & often counter-productive (the Maryland registry has cost 2M dollars & not helped solve a single crime).
This level is a criminal record search, and is represented by the US NCIS instant background check (although this could be extended to transfers between individuals as well), or top 1/2 of the front page of a British or Dutch licence.
Registration doesn’t seem to do anything other than produce paperwork, nor do pre-authorised “slots” as per the UK, limits, ammunition limits, having to shoot a minimum number of times a year, or much of the other silliness we have to cope with.