As far as bump-stock themselves are concerned, I don't care about them. I think they are a stupid toy and I would not take one if you gave it to me for free even before the ban. On the other hand, I care a LOT about the BAN. First off, it has no basis in law. A bump-stock is not a machine gun and the laws regarding machine guns do not cover it. The ATF already made a ruling to this effect. The president in effect ordered ATF to make them illegal with no basis in the law. Second, as other have said, it does not take a bump-stock to "bump fire" a semiautomatic rifle. This gross misinterpretation of the law leaves open the door for mis-classifying all semiautomatic firearms as "machine guns" depending on the whims of the POTUS current and the political leanings of the court system.