If I was giving them advise (but I am not in any position to do so), I would tell them the best way to get back at all those people that started stockpiling & purchasing "assault" weapons that are expected to be on a reinstated or new AWB would be to.... do nothing...

Publicly state that you're not intending to ban any of these things- then the prices would drop, and all that were hoping to profit (if they already hadn't) from buying these sorts of guns since the election would lose money...

Is that the reason they shouldn't do anything? of course not- but it may appeal to them at some level...

if they really wanted to go about it honestly, they'd attempt to repeal the 2nd amendment, rather than trying to get around it... (and in the process violating their oaths to uphold the constitution)