Modify's High-speed Gear Set for 6mm Gearbox Ver.2&3 has 15.05:1 gear ratio. Made of steel that has been specially heat treated, it is strong, durable and works more smoothly. Its modular design enables easy installation without needing to adjust gear gaps; while the precision gears operate as expected and are easily maintained.
Upgraded Airsoft Gear Sets increase performance and durability of airsoft guns. Gear sets come in different ratios, but the lower the ratio (or high speed gears) the faster rate of fire.
High speed gear (lower ratio) increases ROF of AEG. Standard ratio has the same ratio as stock AEG. High torque gear has ratio higher than stock to operate stronger spring to achieve higher muzzle velocity.