The KWA KMP9 Low Power Bolt is designed to drop the FPS of a standard KMP9 by approximately 50-70 FPS.  You can use the link below for installation instructions on this drop-in system, but please kindly note that installation of this product will void any existing warranty unless performed by the KWA Technician Team.
https://www.youtube.com/watch?v=tq3q5oN5fDM&feature=youtu.be

This unit will make your KMP9 or KMP9R CQB ready in just minutes!