Guarder SP Series Airsoft Springs

The SP rating generally corresponds to the approximate muzzle velocity in meters per second (m/s) when using 0.20g BBs, though your specific internal setup—like barrel length and air seal quality—will significantly impact the final result. It is best to choose a spring based on your local field's FPS limits and your current compression efficiency.

These springs are designed for standard AEG (Automatic Electric Gun) gearboxes. However, compatibility can vary depending on your specific gearbox version and internal modifications, so always verify that your rifle uses standard AEG-style springs before purchasing.

Installing a high-tension spring puts significantly more stress on your gearbox shell, gears, and motor. Unless you have reinforced internal components, such as a high-torque motor and metal bushings, using these springs can lead to premature wear or catastrophic failure of your gearbox.

When moving to a significantly stronger spring, it is highly recommended to upgrade your piston, piston head, and gears to handle the increased load. If you are down-tuning to a lower spring rating, you may not need to change other parts, but you should ensure your air seal remains consistent.

Guarder SP springs are known for their consistent compression and durability, which helps maintain a stable muzzle velocity over time. Unlike many stock springs that can lose tension quickly, these are engineered to retain their rating through repeated use.