My old JG M4 had a -14mm CCW thread so it should fit.
From what I have read, the silencers work a bit, mostly over range it quiets or changes the frequency of the piston's noise. You still hear a noisy gearbox and motor.
To install it, loosen the tiny allen screw on the bottom of your flash hider, then twist it off and screw on the silencer.
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