Not being cognisant of your gun laws , dmcg, I am hesitant. However, suppose guns were never sold in supermarkets (I hope they aren't ! ) but then five judges against four said they must be sold in said shops.   Let us suppose that some till clerks refused to sell them due to religious or other moral reasons and were threatened with unemployment.......then, yes, I think that would ALSO be legalised descrimination. This seems some sort of comparison, and I hope it answers your question........