The auto sear, or “Glock switch,” converts a handgun into a weapon that fires 120 rounds a minute. The lawsuit wants Glock to ...

There's a growing number of guns being converted into machine guns. Here's why it matters: When someone opens fire with a machine gun, it has the ability to cause more damage, and impact more lives.

"The device is about the size of a dime, and, once installed, it can allow the shooter to fire ... to illegal machine guns with an auto sear, which officials described as a cheap, small device ...