Rocket/SHS M100-M170 Springs

Rocket Airsoft M110 AEG Spring.

Silver type upgrade spring non-linear. 

Fits in all gearboxes. 

FPS Estimation (Depending on barrel length and compression) 

Heavier Springs are more commonly used with DSG Builds.

M100 - 300-330 FPS

M110 - 340-360 FPS 

M120 - 380-400 FPS

M130 - 420-440 FPS 

M140 - 450-460 FPS

M150 - 480-500 FPS 

M160 - 520-530 FPS 

DSG application

M150 - 340-380 FPS Depending on Barrel Length (Most Commonly Used)
M160 - 380-410 FPS Depending on Barrel Length