A Glock switch, also known as an auto sear or machine gun conversion device, is an illegal aftermarket accessory that converts a semiautomatic Glock pistol into a fully automatic weapon.

accusing the company of making handguns that are easily modified to fire as illegal machine guns through a cheap add-on known as a “Glock switch.” The lawsuits said the $20 switches transform ...

The loaded gun that was found in the car had a “switch” device added ... the hospital for a self-sustained injury, police said. Glock switches are tiny devices that turn pistols into machine ...