The Hybrid Mule Optics are made by Andy Zhu you can contact him on Facebook.
The Illuminated tailcaps were designed by @gchart, you can check out the thread here:
The Copper spacers for the triple and quad conversion are made by @kiriba-ru and can be purchased from @Chatika_vas_Paus.
I got the 519A from @clemence
The MCPCBs are the standard 20mm Copper DTP Triple and Quad 3535.
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