For Gearbox Ver. 2/3Important part for upgrading your AEG. Full steel teeth piston Made more power and durableSuitable for mainstream high-speed tune-up and has excellent operational characteristics Reinforced piston provide extra duration during rapid & prolonged firing. Notes: Upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed. Color - blueMaterial - Reinforced Plastic Length:65mm
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