It depends on where you are. In most U.S. states, they do not have to be.
All firearms owners or users in New Zealand are required to be registered - these records being held by the Police. As for handguns, I understand that these are allowed to registered members of a registered handguns club, but there are strict regulations regarding where and how they may be stored.
The best answer will be from your local police.
Regular handguns have never been required to be registered by federal law. A few states have registration, but it's a local state law.
No
Check with your local police.
No.
Your local police can provide you with a correct and up to date answer.
Contact your local sheriff or police agency.
Yes. The answer is, it depends on where you are. In the United States, in most states, shotguns do not have to be registered, and for that matter, handguns, contrary to extremely popular, but patently incorrect belief, neither do handguns.
No. Minors cannot be sworn police officers.
Like most of the US, Virginia does not require registration of ordinary firearms. In addition to meeting Federal law, machineguns must be registered with the State Police, but not rifles, shotguns or handguns.
Because there is no such thing as a "Registered Gun Owner" in Michigan. There is no requirement for registration of a firearm other than handguns. Contact the Michigan State Police for additional information. By the way, information contained in such databases is not open to the general public.