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Also referred to as a "button". More formally known as an "auto sear." A switch, formally known as an "auto sear," is a small device that, once installed, converts a semi-automatic firearm into a fully automatic machine gun. Switches are usually associated with Glock Handguns, as Glocks have rather simple parts, making them easier to install. The alternative name, "button" comes from the button on the device that you press to activate the full-auto feature. The press of this button allows the firing pin within the firearm to constantly reset with just one trigger pull, making the firearm shoot rapidly until the trigger is released.
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