Even if you don't need any more guns, I say go out and buy some. Get a cheap .22 or something. Buy them as gifts. Get a mosin or something different than your normal purchase. Anything, really. The reason being that this gun buy-up is good. Sure it sucks for the price of ARs, but it also sends a message to Washington that our letters and emails never could. It shows politicians that the gun culture in this country is stronger than ever, and that there are enough people out there that don't want a ban, that doing so is going to cost them a second term.
Really, if only for the sake of activism, buy guns! BTW, I don't see any shotguns in that picture. Everyone needs a shotgun. I also don't see any suppressed weapons, so you could get creative.