Sometime ago I argued this point with Workman in Washington forum. He took a hard stance it is never a 1st amendment issue. He has since changed his tune he wrote that it can be after several showed up to the assault weapon ban in Oly.
Kind of off topic but to me it showed how even nudity can be a first amendment issue, (was one of my arguing points way back when).
A Florida woman was arrested for topless protest, and was released since here being topless was a free speech issue related to her protest.
OC was very attractive to me because it does "speak" about our rights and lets people know and confront issues they may have pushed to the back of their minds about our rights and gun issues. That means it is very much a free speech issue in my mind. And of course there are the countless conversations and "educating moments" that I have been able to have that I wouldn't have if I was concealing.