Bump stocks. They pretty much do whatever they want.
Bump stocks probably SAVES lives as the shooter can’t shoot accurately. I wouldn’t have one if gave one BUT I’m against the over reach on that accessory on general principle.
Not the same. The ATF went through the administrative rules procedure and change the Code of Federal Regulations. In the case of frames or receivers, they simply made "classifications" without following the Administrative Procedures Act (APA).