A Glock switch So converts the weapon right into a machine pistol capable of automated fire.[nine] The product is approximately the scale of a Usa quarter, and when put in about the rear in the slide with a Glock pistol (replacing the slide protect plate), provides a selective hearth switch; https://glockswitches20799.blogpostie.com/57470000/getting-my-glock-with-a-switch-to-work