The Endgame Gear OP1 8k uses Kailh GX SPDT (single-pole double-throw) switches with top and bottom contacts. These switches are designed to provide incredibly low latency while limiting potential accidental double-clicking.

Using the configuration software, you can toggle SPDT switch modes between GX Speed, GX Safe, and OFF.

GX Speed mode provides the lowest possible click latency performance. Its click detection starts when the contact plate separates away from the top contact, whereas, with the SPDT setting OFF (and with most other mechanical switches), the click detection starts when the contact plate hits the bottom contact.

GX Safe mode will be just as fast as the OFF setting but adds extra hardware debounce to guard against potential double-clicking events. You can reference a description and visual illustration from Endgame Gear’s public Discord channel on what these settings do here.

This mouse’s main buttons have a swappable design, so you can change or replace switches without needing to solder them. For an additional purchase, Endgame Gear provides two ways to do this:

The first option is a Universal Switch Pack, which includes two switch PCBs with universal sockets. This option is designed to be more temporary, making it easy to test multiple switch options to see which you like best. You can see the Universal Switch Pack on the Endgame Gear website.

The second option is an OP1 switch pack. This is designed to be a longer-term option if you know which switches you want to use. Each switch pack includes a set of two switches that are soldered to a switch PCB. Endgame Gear sells a variety of switch options, including lighter, heavier, and silent switch options, on their website here.