The FPS for a particular spring is related but not limited to many variables such as Piston O-Ring seal, air nozzle seal to the cylinder head port and hop-up rubber, etc. With this in mind the Modify factory tests results were (after 30,000 bbs fired):
S100+: 369
S110+: 405.9
S120+: 443.75
S130+: 470.74
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I must not fear. Fear is the mind-killer. Fear is the little-death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me.
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