I posted earlier that I thought I was getting bolt "stick" with the level 10 bolt and a hyperframe. (You can read about it here http://www.automags.org/forums/showt...threadid=63676) However, it wasn't sticking on return, it was failing to push the paintball all the way into the barrel and was stopping about the point the power piston came to the end of the oring. The hyperframe was providing a much shorter trigger pull time so the on/off opened before the bolt could get back. Hence, bolt stick. Switching to the shortest sping solved the problem. Just thought someone else might have the same problem.