In the US, firearms sales are regulated by federal and state laws.
There is no "license" required to purchase firearms under federal law.
Sales between private individuals are not regulated by Federal law, so a person can purchase a firearm privately from another individual.
HOWEVER, state laws vary and must be complied with, and some states require a permit to purchase a handgun whether from a private party or from a dealer.
Sales of firerms from a dealer are regulated and require a background check called a NICS check. This is a one time process per purchase and the record of the check are not kept permananetly, or not supposed to be kept.
so, a firearm can pbe purchased from anyone, there is no 'license", and state laws should be observed.
Yes.
yes you can buy bullets without a license you can also buy cartridges without a license.
If you are 21 and have no criminal record there is no requirement to have a carry license however you do need one is you wish to carry concealed.
yes
No it's not necessary.
Yes
Yes, Here in Canada the law is 500 fps and under. I would check around to see yours.
No.
no
Can u buy a motorcycle without a license in Florida
no
Gun laws are dependent on your State. In Texas there is no requirement to register or license guns. A person who carries a gun on their person must have a Concealed Handgun License (CHL), but not the gun itself. It's legal to have a gun in your car without having a CHL.