- Army Force CNC Super High Speed 13:1 Gear Set For V2 V3 AEG- Made out of CNC steel. - Designed for Replace the Original Gear Set.- 3mm diameter removable gear pin.- High speed type would increase rate of fire, best use with higher voltage battery, make them suitable for high torque spring.- Drive ratio 13:1.- Suitable for M110-M150 spring.- Recommend 12v or above battery voltage. - User should apply proper lubrication when installing the gears set. - Suitable for V2 V3 AEG Rifle GearBox. - As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed. - Weight - Approx 64g - Original Packing