Potentially useful regulatory distinctions

Some useful distinctions, I think:

* Regulating using a gun * Regulating carrying a gun * Regulating owning a gun * Regulating parts of guns * Regulating tools that can be used to make guns * Regulating the information necessary to make guns * Regulating the information necessary to make tools that can be used to make guns

Bonus distinction:

* Substantial noninfringing use * Substantial non-horrific use Read the rest