ZCI Reinforced Gearbox – 8mm, QD Spring Guide, Micro Switch [M-45] - $30.00 : Clandestine Airsoft, Your source for Airsoft parts and accessories
This microswitch gearbox has proprietary selector switch, no where to be found in europe. I needed extra one for dmr build, so i made it out of plexi. Looks rough but works. :