Circular logic at it's worst. The only reason they aren't more common is because of the unConstitutional Federal over-reach in bloody well "infringing" our Right to own them.
Bootstrapping an unconstitutional infringement into constitutional, brought to you by Justices Scalia, Roberts, Alito, Thomas and Kennedy. Enforced by a host of District and Circuit Courts, on a dim-witted and weak public.
The federal Court jurisprudence on the second amendment is illegitimate. It's fabricated from falsehood and lies. But they have the big guns, and might makes right. Government of men, not laws.