Modify Spring
Model: MOD M150 Manufactured by: MODIFY Parts
This upgrade will give u a more reliable spring with better consitancy over the crono, and also upgrades your fps.
m100=310-340 fps
m110=330-380 fps
m120=380-405 fps
m130=405-420 fps
m140=420-450 fps
m150=450-500 fps
