Another thing that helps reducing the sound signature is to put some strips of AC isolation foam. I did that with my g&g f2000. Since it's a bullpup the gearbox is closer to the body + all the foam strips inside the shell really muffle the sound of the gearbox. That coupled with my 8 inch silencer with foam inserts... the sound report is close to that of the tm mk23. This is the most quiet aeg that I have ever heard.
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