Roller delayed blowback is OP
@valleyforge is it still just CMMG designing those or have some other Manufacturers gotten in on the action?
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@jamesrichardson CMMG does rotary delayed blowback which is very similar and arguably better. It's HK that does roller delayed stuff
@valleyforge my next build will probably be an AR in 5.7 and maybe with a CMMG BCG
@jamesrichardson Arguably better in the very specific context of pistol caliber ARs. I don't think anyone has successfully scaled rotary delayed blowback up to a rifle caliber