Originally Posted by Conflicts6
...my old spring was an element m125. It was rated at 430 fps. The PDI 190% spring is rated at 380-410 fps after the break in period. Or that is what it should be.
euh... thats not really logic.... 190% means 90% more power then the original spring of the TM m4.... and that means it would shoot over around 450fps.... not 380fps