Quote:
Originally Posted by pestobanana
Try a different piston head. I find gearbox compression tests not too revealing about what FPS you can attain with the spring. With a Modify S100 spring, I would get 330 fps with a Lonex POM piston head, 360 fps with a KA aluminum piston head and 395 FPS with a Modify piston head. When I tested for compression they all felt the same.
LOL I've seen 90 fps losses.
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I got 3 different ones so i will give those all a try