Ultimate Mil-Spec AEG springs are manufactured out of the best steel (SiCr) available for springs. With a minimum loss in power and consistency, the Mil-Spec spring series is the ULTIMATE choice for your AEG. The Mil-Spec springs are color coded for better identifying them when switching out the spring for different skirmishes.
Power ratings were attained using a 300mm-length 6.03mm-diameter inner barrel with a volume-matched cylinder and no hop-up applied. Choice of parts used will affect the final muzzle velocity