@jamesrichardson CMMG does rotary delayed blowback which is very similar and arguably better. It's HK that does roller delayed stuff
@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
@valleyforge my next build will probably be an AR in 5.7 and maybe with a CMMG BCG
@valleyforge is it still just CMMG designing those or have some other Manufacturers gotten in on the action?