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Systema Complete M120 Gearbox for M4 Series

Systema Complete M120 Gearbox for M4 Series GB16V25F-12X
Complete reinforced and upgraded gearbox from Systema. Quality parts and thoroughly tested by Systema's technicians, these gearboxes are ready to be dropped directly into your AEG for instant upgrade configurations. Teflon coated parts ensure smooth operation. Trust your gun to nothing less than the best in the Airsoft Upgrades Business - SYSTEMA.

Note: Installation should be handled by an experienced airsoft technician only. The alignment of the motor on your gun to the first bevel gear must be done correctly in order to avoid stripping the gears on first test. These gearboxes are thoroughly tested to operate correctly before they leave Systema's factory. Kastway Airsoft will not cover any damages incurred by improper handling and incorrect installation resulting in damage to the gearbox and/or your gun.

Parts included:
  • Reinforced Gear Box
  • M120 Spring
  • Spur Gear Set/ Torque UP
  • N-B Cylinder Set
  • Metal 7mm Bushings with Ball Bearing
    • GB16V25F-12X
    Your Price $240.00
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