It sounds like you are having two problems at the same time.
1) If you hold the trigger down and the gun shoots and then leaks, then you have a bad on-off oring.
2) If it leaks with the bolt in the reset/cocked position, your problem is in the powertube. Change your powertube oring and then adjust the spacer length.
1) If you hold the trigger down and the gun shoots and then leaks, then you have a bad on-off oring.
2) If it leaks with the bolt in the reset/cocked position, your problem is in the powertube. Change your powertube oring and then adjust the spacer length.
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