Originally Posted by boobie817
I figured it out. The 2 orings on the reg piston were the wrong type. They were Teflon not buna 90. It sealed right up once I switched them over. Thanks
Glad I could save you the suffering I went through! FYI, buna 90 probably will give you problems in the future. I had problems with the gun staying pressurized after I had turned off the air, bled the line, and pulled the trigger. In a weird way, the butyl orings also seemed to mess up my timing. Polyurethane is the way to go, and nowadays one of the few ways to get it is with an official rebuild kit.