(Link to Jerry Miculek video with bump stock
Bump stocks are not machine guns. Not only are they not machine guns in the legal definition, they are significantly different from machine guns in other ways as well.
In the recent Supreme Court decision on Garland v Cargill, Justice Clarance Thomas wrote:
A semiautomatic rifle equipped with a bump stock is not a "machinegun" as defined by §5845(b) because: (1) it cannot fire more than one shot "by a single function of the trigger" and (2) even if it could, it would not do so "automatically."
Far left VOX claimed Thomas was lying. From Vox.com:
The six Republican justices handed down a decision on Friday that effectively legalizes civilian ownership of automatic weapons. All three of the Court's Democrats dissented.
In fairness, Ian Millhiser at Vox goes on to explain the arguments on both sides of the decision. .....