SHS M90 AEG Upgrade Airsoft Spring M/S
Manufacturer: SHSM90 AEG SpringVariable Pitch SpringSHS spring's greatest attribute is their value. These springs cost considerably less then most other AEG brands. However, don't let their price fool you. They are still the high quality upgrade you would expect from SHS.Variable pitch springs, like this one, create a more durable gearbox.