Quote:
Originally Posted by Dozer_01
I have a systema M120 box with a 550mm Prometheus 6.03" barre; and shoot 375 and my buddy has the same box but with a stock barrel (m4) and shoots 330. It's pretty odd. Systema definately has quality control issues!
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Could be some air seal loss around your hop and inner barrel if the parts aren't fitting nice and tight.