sounds to me like the reg is gone i know this because this is what happened to me and i went through 5 of the little fekkers. i found that the problem occured when i was filling the rifle to 300bar as instructed, so on the 6th ive only ever filled it to 200 and its is still working fine mate.
Shotgunkid aka Gorrila Hands
Anschutz 2002 + mtc viper connect
Weihrauch hw99s + sr12
Daystate CRX-st+ mk1 big nikko in warren edwards stock [url]