To be honest, I really don’t think that will make much of a difference. They were used in that one shooting in Vegas but typically aren’t. Also, if you Google bump stocks, one of the things you see is how to make homemade ones.
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I remember before Las Vegas serious shooters saying they didn’t like bump stocks. They aren’t accurate and waste ammo. They are either good for fun or shooting into a crowd randomly. Banning them is a tiny loss.
Make no mistake, this is a huge win for the anti-gunners. The precedent has been set.