Unlike printers, there is something else that is often not talked about, except in legal circles as regards guns.
That is the public safety component. It is there, like it or not. The courts will take it into consideration.
As such, any claim to "public safety" must be a demonstrable claim... At least, that is what the 7th Circuit has said in Ezell. It is also addressed in many of Gura's briefs, in many of his cases.