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Old 07-11-2019, 01:53 AM   #5 (permalink)
Ok_Go_For_It
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Join Date: Jan 2014

Make sure the Valve Pin / Cup Seal is not broken. I'd look down the receiver with the bolt removed so that you can see if the Valve Pin stick out from the Valve Body. We had a bad run of Valve Pins that would break after a few hundred shots.
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