excellent question Bob, the same question came to my mind from a related thread I posted.
I have never read any laws about printing. My take on this is if anyone cannot identify the kind of weapon then your legal even if they know you have one. But that doesn't mean an officer would not intervene if a concerned citizen calls it in and in that officers eyes a gun is a gun and that might be all they need to prove identification of the weapon.
this is why I always critique my technique, and consider my 'interpersonal tactics'
I think the legal answer to this question is a work in progress.