Never happen - we Reps have most of the guns
I'm not sure that is accurate, I've never seen any data supporting that. Openly supporting guns through the NRA and other gun rights groups probably accounts for 5% of guns owned in America. Lots of hunters, collectors, gang members, and regular gun owners don't participate in those groups or discussions. On top of that since about 50% of voting age people bother to participate. There is no telling where that other 50% fall on the political spectrum and I'm sure a good percentage of them owns guns.