No, its a state law.
But it does raise a federal BOR issue re incorporation under the 14th Amendment so that’s why the lawsuit was filed in federal court.
The issue is whether the state of Florida can punish law-abiding young people for the act of a young gun madman.
According to the NRA, that’s cruel and unusual punishment.
Now Heller does say states can regulate firearms use but it must not deprive people arbitrarily of their RKBA.
This is not over.
No, it’s not state law until now.