>>63994075
No you fucking retard by lowering the BCG weight you significantly reduce the window in of operating parameters where the gun will function reliably.
One of the reasons for this is the significantly increased bolt velocity.

Sometimes the window of operating parameters is reduced to such a degree that no amount of tinkering will make the gun function reliably.
https://www.youtube.com/watch?v=PuJszcH_R-M