Jack-booted thugs. Murderers. A principle weapon against the pro-life movement.
I remember reading in my NRA magazines in the late 80’s that the ATF would issue notices (scams) that some semi-auto firearms could have the potential to fire more than 1 one round per trigger pull, particularly Browning shotguns. They asked that if you had one to take it to them and they would test it for you. They trapped a couple of folks with this scam and charged them with illegal possession of an automatic weapon. They would load them up with rounds with special primers that would guarantee a double shot.
I had a Baretta A606 semi that would on occasion shoot a double but I kept that to my self.