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I'm not sure if I'm properly identifying the part, i saw it labeled as barrel bearing once though. its the part of the booster/flash hider assembly that connects directly to the barrel shroud, then the booster/ flash hider screws into it... Mine seems to be stuck, and stuck really good, I cant get it to budge at all any advise on this issue??

If it's an MG34 barrel bearing screwed into the shroud, it isn't usually necessary to remove it. That said, let it stand upright immersed in a can of "Kroil". The stuff really does creep in and loosen anything, Good luck!...Phil