No
Federal law says you have to be 18 to buy a long gun and 21 to buy a handgun. Find a lawyer familiar with firearms law to get a correct answer to your registration question.
NO
No
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YES
Depends what country you live in and the regulations regarding firearms.
Provided you are not a convicted felon, you can buy long guns at 18 and hand guns at 21.
A juvenile can be a felon for the rest of his or her life if they are tried as adults. If not it will show up on your police record but it is not suposed to be held against you.
no felon can own or purchase a gun
no In the U.S. a felon cannot possess a gun at all, unless the felon's rights have been restored.
Felons are never allowed to buy or own guns.
Yes. The felon cannot have access to the gun.