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■PROMETHEUS Non-Linear Spring●Non-linear, irregular pitched designed to ease wear and tear on your gearbox ●Easier compression, with less overall stress ensuring greater durability   ●Heat-treated for greater strength and consistent compression  ■The spring of an airsoft gun is a ba..

The Prometheus Non Linear Springs are non-linear, irregular pitch springs that are designed to ease wear and tear on the gearbox of your AEG. These springs brings the same performance as the previous versions but they are now color-coded for easier identification! Also, you will not have to ..