The Patented SWiTCH® only has two positions, ON and OFF. Working with mechanical advantage and entirely redesigned geometry, the SWiTCH® offers the operator the very best result in pull attainable without any of the guesswork. A Glock switch is considered a “device gun conversion machine” under the National Firearms Act https://glockwithaswitch57766.shotblogs.com/switches-for-guns-can-be-fun-for-anyone-49303350