1. do you knwo how to adjust the velocity
(you remove the little metal rod (cocking rod) in the back and insert a 3/16 allen wrench and twist it clock wise for more velocity counter clockwise for less
2. do you have an adjustable regulator
(it should have a allen wrench hole to adjust the pressure.) if you do make the pressure up to 300-400 dotn exceed 450
3.do you hear the gun gass up
sounds like a pffft
I hope it helps if deosn't say so
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