The gear system within a gearbox mainly consists of Sector gear, Spur gear and Bevel gear. These gears are responsible for transmitting the kinetic energy generated from the motor to the piston. The gear ratio typically used in most configuration are 18:1 and 16:1 as they are the perfect balance ratio for the gearbox to run efficiently in both speed and torque. Aftermarket gears offer many more gear ratio that will allow more customized performance of the gearbox that can increase the rate of fire and trigger responds with higher speed ratio gear such as the 13:1, but will require a much higher torque motor to run them properly.The gel blaster gear upgrade is mandatory and the ingredient for a long lasting reliable gearbox operation. Tuning and optimization of the gear with shims is a must to ensure the gears are meshing with each other properly.