Airtech AEG Spring Shim Set (FPS Increase Adjustment) 10mm Inner Diameter

Airtech Studios  Spring Shims (AEG Power Increase) Set of 4 - Universal 10mm Inner Diameter

Universal Spring Shims are used to alter the power of your AEG according to how much power you are looking for. 

The shims are designed to slide onto the spring guide inside the gearbox to create tension in the existing spring. The more shims the more tension and more power. 

4 shims of various sizes are included to fine-tune to the desired power you require. 

Shim 1 - Increase by 5 FPS

Shim 2 - Increase by 10 FPS

Shim 3 - Increase by 15 FPS

Shim 4 -  Increase by 20 FPS