How old do have to be to own a gun licence in USA?

Most kids start shooting BB guns and .22's around 9 yrs old. In my state kids can start hunting at 14, buying a pistol is 21. Not all states violate the constitution and require a gun license to own a firearm.  more

I think it depends on what state....In CA you have to be 18 for a rifle and 21 for a handgun...doesnt matter how old you are to shoot a gun.  more