The Raptors Airsoft ZCI High Torque Airsoft AEG Gear Set is a precision-machined upgrade component that can help improve the performance of your airsoft gun. It is made from high-quality steel and features a 100:200 gear ratio that provides improved torque and performance. This gear set is compatible with most airsoft guns that use standard AEG gearboxes, and it can help increase your gun's velocity, accuracy, and overall performance.