"I've found that with the advance FPS, there is a sacrifice of ROF. This does not need to happen if you have a good motor, with the right amount of torque. This spring upgrade makes you the beast on the field. I would have to request that anyone who gets this Spring, Please warn other players of your extreme FPS range, and make sure anyone that you go against wears full clothing, and full face mask, or else you will tear their skin right up. Even a glaze of a bb going this fast can really do some damage.
Still gotta love the power and intmidation you will bring with it. Eat the enemy. XD"