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Well my experience with the Superlative gas block has not been so good. I have approximately 1200 rounds through a 16" 5.56 rifle and the gas pressure settings didn't stay the same as the gas block became dirty. I use different pressure ammo, requiring different gas settings. Dialing it in was frustrating since the pressure changed before the shooting session was done. I took it apart and the gas block adjustment internals froze up, which was a pain to clean. I have replaced it with my favorite adjustable gas block the SLR sentry titanium, which is much easier to clean and maintain. I know many here like this gas block, but I'll give it a pass...
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