With Kavanaugh on the Supreme Court, this will be challenged. I give better than even odds it is found unconstitutional.
It is like saying you cannot buy books out of state or through the mail.
But then, we have had the unconstitutional restraint of firearm sales for 50 years.
Ammunition, not so much.
It takes 4 votes from the SC to hear an appeal. Kennedy has declined to hear many of them and Thomas has been itching hear them.
Regulating ammo is the same as regulating paper and ink supplies to the commercial press. It is a direct infringement on the ability to exercise a protected right.