Originally Posted by nerdcore
True, forgot about that. Ion regs might not go that high, since Ions run under 200 psi.
Bingo. I think stock ion regs will go to 450 psi. You can do that on a KP if you properly respring it. I have mine at about 475 psi right now with the stock valve and I think I found a better spring setup than what I've been running that will get me lower and have a lighter pump, but I'm out of air to get the details atm.