while the UAR is a neat gun, the way the selector link works makes using mosfet systems like the Perun near impossible. why is that the case?

on the UAR the gearbox is set up like an AK, Safe-Full-Semi, however when using the selector the gearbox is only ever in safe or semi. APS has modified the standard gearbox to disable the safety built in, if you tried to use a Perun mosfet in this gun you could never get the gearbox in Full auto, this would make programing difficult.

my link changes the selectors throw so that the gearbox stops at the correct positions, allowing proper use of the mosfet. i recoment us of a hard filament that does not flex easily. obv i do not recommend PLA as it warps in the heat.

Note:
when setting up the Perun selector. set the little white board to 4.5mm