Archwick L119A2 MWS Hop Up Arm Shim
thingiverse
A shim for the hop up arm in the upper receiver of the Archwick MWS L119A2 body kit. I found that my Archwick L119A2 body kit had an issue where the hop adjustment arm would shift due to recoil which would potentially cause the hop up adjustment wheel to shift or for the hop up adjustment arm to get caught off the tension arm causing inconsistent hop and inconsistent shots (some shots would roll out the barrel, others would be wildly inconsistent). This part is to put pressure between the hop adjustment arm and the wall of the upper receiver to ensure that the hop adjustment arm doesn't shift due to recoil or any other possible movement.
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