Guarder Infinite Torque-Up Gear Set for Marui Ver. 2/3 Gearbox HK416 It is recommended to use

It is recommended to use anti-oil o-ring of size 9*2mm

Light absorbing material made  Glow in dark after exposed to light  Ideal aid to help you aim your target in low-light condition  Suitable for KSC Glock Series Airsoft GBB Pistol

- Barrel Length: 100mm

- Magazine Capacity : 70 rds

Guarder Infinite Torque-Up Gear Set for Marui Ver. 2/3 Gearbox HK416 It is recommended to useEnhanced Torque Up Gear for replacing Marui's Stock Gear Set Torque Up Type recommended to use with SP130 Spring & 9. 6v Battery or higher Half Teeth Polycarbonate Piston use only Set Include: BEVEL, SPUR & SECTOR Gears Suitable for Gearbox version 2 3 Thermal Treatment Processed Compatible with Tokyo Marui, Classic Army, ICS & G&P Airsoft AEG As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if