Jayernie, are you saying that your friend's gun came with TWO springs? Mine certainly did not, but it would have been a nice option to have. I never considered that the stock spring might be to beefy for the stock gearbox....interesting.
Unfortunately, the gun failed before I had a chance to chrono it, so I have no baseline for comparison. I think I will install the stock spring, chrono it, and if it's firing at some stupid-fast FPS then I will swap in a m110 or m120 spring and take it from there
