You don’t need a gas buster CH. you can take any of them and drill a small hole in the side.Suppressors Silencers
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What makes a MUCH bigger difference is making sure your rifle isn’t over-gassed.
Check out the BRT reduced gas port system
At BlackRiverTactical.com
I put them on a few of mine and they run smooooooth. Including my 10.5” 5.56, I never smell any extra gas at the CH.