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something about this whole playing with the gearbox really intrigues me. 2 days ago i ventured into breaking down m4 and removing the gear box to change out the spring. I am not gonna lie, definitely not the easiest thing to do and it took MULTIPLE tries to get everything to work properly. I even had to go back to the store and get a little help. overall I am glad to know how to do this and even learned some stuff. but like anything, once you start it can be like opening pandoras box. now i cant stop thinking of other tweaks (like shimming) that could potentially be done to the gun and I have not even go out to play.
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