The same logic could be applied to gun stores, however, that would be a bit more of a reach calling the action of selling a gun "speech".
Strangely enough theres a court case in CA that might have even gone Federal, Imbert and Smithers used to have a sign with a
pic of a revolver on the sign. The county/city/gov told them they couldn't have that on the sign. I think they took it to court and
won eventually.
-Mike