Notice though he has not banned bump stocks 1 year after the Las Vegas shooting. So he is not just acting unilaterally to ban them. What is he doing exactly to ban them?
Here is President Trump at a news briefing back in Oct. 2018. He thought it would be 2 or 3 weeks back then to finally enact the ban. Perhaps he is finding that banning them is not really possible? At least he is going through procedures, and not creating his own laws. Also, the NRA said they would not fight a ban.
So everyone needs to wait until it happens, and how it happens, if it happens. As it stands right now, bump stocks are still allowed to be bought & sold.
You are incorrect. He is NOT going through procedures. Full auto weapons are precisely defined in law, and ATF correctly defermined that bumpfire stocks did mot comvert a firearm to full auto . By declaring bumpfire stocks to be machine guns ATF would be effectively assuming the role of congress in writing legislation. If this is allowed to stand the potential damage would be enormous, and not limited to firearms and the 2nd amendment.