A 'Glock switch' is a small (often described as Lego-sized) device that can be 3-D printed to modify a Glock pistol so it fires in a fully automatic mode.
October 13, 2025
high
definition
Describes the conversion device commonly referred to as a 'Glock switch'.
Conversion devices that turn semi-automatic pistols into fully automatic firearms, such as 'Glock switches', are illegal (they have been characterized in reporting as already illegal).
October 13, 2025
medium
legal
Legal status of conversion devices that enable fully automatic fire.