Cyclone 7 M100 Spring for NGRS Series.
M95 Spring made specifically for the Tokyo Marui Next Gen Recoil Shock series. Spring when fitted to NGRS produces 345-360fps on a .2 BB. Although we strongly recommend when any spring is fitted to any AEG you have the gun tested before taking it on a skirmish field.
BS5216 HS3 Spring Steel
Made in England