I can think of only ONE situation where a bump-stock would be really useful: to lay down suppressing fire. The accuracy drops with the stock use and the thirty round mags empty quickly. In suppressing fire a 100 round mag would be needed. I’m not poor, but AR ammo costs too much to just burn it up playing.
They are completely useless. However this is not about bump stocks. It’s about “other devices”. Which to a Democrat is EVERYTHING under the sun.
The GOA explains it far better than I can.
https://gunowners.org/gun-owners-of-america-statement-on-pres-trump-bump-stock-memo.htm
That’s pretty much the function of full auto fire. To lay down suppressing fire. But one doesn’t have to be accurate when firing into a large crowd of people.