Originally Posted by MaciekA
That tiny pin just above the trigger is what you want to gently tap out. Make sure to remember the direction that it came out in. Also, make sure that the first end to come out has a bit of grip engraved on it; sometimes it's a crosshatch, sometimes it's just lines, but only one end has the grippy bit. That end comes out first during disassembly and goes in last during re-assembly.
After that it's super easy. Your selector switch doesn't need to come out at all.
Correct. I work on these all the time (mods not repairs). Providing it's still in factory condition, the pin come out from right to left with a 1/8" pin punch and a small hammer. Just be sure to put it in the same way. The selector switch is much more difficult to remove, so if you don't need to, don't.