The bill, which would add machine gun conversion devices, known as Glock switches, to Pennsylvania’s list of prohibited offensive weapons.

A Glock switch is a tiny device that turns a semi-automatic handgun into a machine gun. One pull of the trigger, and it sprays bullets until the magazine is empty. These aren't tools of self-defense. They're tools of mass destruction. Even trained shooters can't control that kind of firepower. For innocent bystanders, the risk is off the charts.