Modify Airsoft AEGs coil spring with irregular-pitch for the Tokyo Marui is designed for enhanced performance. Precision manufactured of high grade piano with high durability and strength, the Airsoft AEGs Spring is easy to install to offer airsoft players who demand very consistent FPS.
Modify AEG Spring (S120+) / Velocity (fps) / Test Report...view more
|Modify||ave. Velocity (fps)
(springs tested were in brand new condition)
|ave. Velocity (fps)
(springs tested after shooting 30000 pcs of BBs)