Umarex MP5A5 EBB 360 degrees selector switch
 

Hi, i was disassembling my mp5 and reassembling it when i tried to reassemble the switch and it goes 360. It is stuck on semi and i do not remember where the switch was last set on before i took it off. I tried many times putting it back and in out and spinning it to find where the safe option is so i know how to align it but i couldn't. A screw inside my pistol grip holding the gearbox in place is completely stripped so i really cant take out the gearbox. Yes im a noob. where do i start with this????

The MP5A5 has a toptech gearbox, has pneumatic blowback

Gearbox is version 2

Installed a Tokyo Marui Eg 1000 motor in it.

You need to take the mechbox out to put the selector in the right position.