M100

∙ M100 spring
∙ manufacturer: WE

Oil Quenched/Tempered Si-Cr Alloy Steel Wire. Not for Tokyo Marui PSG-1. Progressive (nonlinear) winding gives lower resist at the first phase of pressing, but spring keeps the same power.

FPS test on Tokyo Marui MC51 for Prometheus Non-Liner Spring (MS100):
Spring MS100 ---------- 340 - 350 fps

Spring is the basic part of the airsoft gun. It is part which notably affecting shooting range. This spring is made of tempered SiCr alloy steel wire. Progressive (nonlinear) winding gives lower resist at the first phase of…