I have had 2 challenger pros and both leaked shortly after owning them, plenty of the others were just crapshoots, to me that is unreliable. Yours must be a good one..Not all AEA pcp's are unreliable. I have had mine for going on 4 years and only replaced 1 o-ring, have taken out woodchucks at 144 yards with clean pass through, capable of 340fpe, 3 shots from 100 yards., daystate,FX can't match pure knock down power.
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