but its at the bottom, not the top.... If the whole mod is the negative and the bottom pin touches other metal even with the insulator, then I don't see how it would cause a short.
I don't either. But my thinking is that it is there for a reason. If it was a non issue to have one there or not have one there then I don't think they would be there. But it is there and that leads me to believe that there is a good reason for it being there.
I could be totally wrong in my assumption though. I certainly do not know all that I should know about the workings of mechs. I need to though since I'm a mech user. Hopefully someone with a better understanding of the purpose for the delrin will chime in and learn me something.
I just want you to be safe is all.
If you use it without the bottom insulator, it can and probably will autofire. The delrin is the only thing that keeps the battery from closing the circuit on the negative pin.