This is a very nice bolt, i got around a +10 in velocity after switching out with my stock bolt. Its made of delrin so it wont scratch the body at all and doesnt need o-rings, so thats one less thing to lube. Only problem with this bolt is that delrin is a pretty weak material; when i first got the bolt i still had a metal detent and it took a pretty good chunk out of the bolt, didnt affect performance at all, just chunks being taken out of your bolt is never a good thing so get a delrin or plastic detent right away.
Conclusion:
This is one of the best bolts you can buy, increases velocity doesnt wear down your body, what more could you ask for?
