For Gearbox Ver. 2/3
Important part for upgrading your  AEG.
Full steel teeth piston Made more power and durable
Suitable for mainstream high-speed tune-up and has excellent operational characteristics
Reinforced piston provide extra duration during rapid & prolonged firing.
Also contain a Silent Piston Head
Increase efficiency of  piston
Notes: Upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed.

Color - Green (Piston)/Red( Piston Head)
Material - Reinforced Plastic
Length:175mm