Rocket Airsoft M100 AEG Spring - Silver

Rocket Airsoft M100 AEG Spring. Silver type upgrade spring that is non-linear. Fits in all gearboxes. A lower FPS than standard for faster RPS builds, lower field limits, or guns that want to last longer with less strain on its parts. (please note: packaging may be generic or labeled as 'Rocket Airsoft', but is made by SHS OEM) A standard spring for FPS ranging in the 320-330 or so. Silver steel make.