Cut-off microswitch holder for LCT AK V3 gearbox

This switch holder allows you to set up a microswitch to work with the Perun ETU++, in the case of not needing the original trigger. This is ideal for full DIY builds and bullpup setups. It may fit other V3 gearboxes, but I have not tested. The .step is included for fine tuning and adjustment. 

You will need an Omron D2F-01 or similar. I recommend a high quality switch for maximum longevity, and the low activation force models are ideal. However, if the spring is not adequate to keep the switch depressed, you may need to upgrade the spring for the cut-off lever. It's 3.5mm diam, roughly 12mm, 0.4-0.5mm wire diam. You can always cut coils off if it's too strong. It only needs to keep the switch depressed. It's designed to work in the NC (normally closed) setup. 

Note: 2mm pins are required to hold the switch, unless you're happy using glue.