I was a little skeptical only going off reviews of this bolt, I mean, the stock bolt seemed pretty light already and o-rings are just o-rings, but... The i got the package in the mail that says how much to lower the psi and dwell by and that made me pretty happy. After taking it out and shooting it right away things were much improved. It was more quiet and there was way less kick. I'm happy about the increased air efficiency, especially because I still use a 68/3000 HPA tank. Great price and fast shipping from Critical PB. Thanks.
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