I can tolerate a Clinton-style ban so long as we can circulate the existing ones.
So, when the magazines for your guns are $150, that'll be tolerable? How about $2000 for a new upper for your AR? Because that's what's going to happen.
Some manufacturers will go out of business, and others will have to raise prices on their non-banned wares to make ends meet. Things will be rough across the board.
What's more, if they get away with one ban, you can certainly expect others to follow.