Replacing the AEG Mainspring in your AEG is a simple way to adjust the FPS higher or lower, based on your needs or style of play. Keep in mind that as you go higher up the spring scale, you are increasing the pressures on the gearbox system and components. Anything over M120, we suggest upgrading components like your gears, switching to a metal spring guide, and a more powerful battery system. The FPS Range shown is based on a BB weight of 0.20grams and is just a guide – your actual results may vary.
- Irregular pitch spring coils: Variable tension. Reduces stress, wear and tear for your gearbox
- Strength: Made out of stainless steel. Increased tension and durability. Tension lasts 50% longer than other leading brands
- Compatibility: Designed for all versions of Airsoft AEG gearboxes
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