Springs

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120 m/s FPS spring has been calibrated on 363 mm inner barrel and gearbox with type D cylinder (for barrels from 301 to 400 mm).Of course with shorter or longer barrel the performance will decrease or increase, therefore the calibration will be harder or softer.In the calibration process has not bee..

Outer diameter: 14.5mm..

■PROMETHEUS Non-Linear Color Coded Springs●Color coded spring rates for easier identification ●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 consi..

■PROMETHEUS Non-Linear Color Coded Springs●Color coded spring rates for easier identification ●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 consi..