Originally Posted by xylum
Yeah the spring in the box is the M100 spring. 300 FPS is not exactly what I was looking for, I thought it would shoot around 360 FPS with the M100 spring. Do you know how much an M120 spring would run? Would that boost the FPS ot 180 or would an M130 being required?
Is the spring marked as a "100" spring? Otherwise, how are you sure that it's an M100?
Spring codes (100, 110, 120, etc) are expressed in metres/sec. Most folks run M120 springs.