Jing Gong AEG upgrade parts series.
Replace Marui's original gears with this upgrade high speed gear.
Suitable for airsoft electric gun with version 2 & 3 gearbox.
High speed type would increase rate of fire, best use with higher voltage battery, make them suitable for high torque spring.
 Suitable spring: M110-M150.
Recommend battery voltage: 12V or above.
Super high speed type.
Upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed.

 
Color - Black and chrome (gears)
Weight - 86g