PolarStar Fire Control Unit, Rev. 3, Universal Built in MCUEquipped with an LCD screen and joystick you are able to easily scroll through menus and precisely adjust settings for the utmost control over the system. This FCU is also universally compatible with all PolarStar HPA systems including both dual and single solenoid systems. This latest REV3 model features updated voltage regulators which greatly improve energy efficiency as well as significantly reducing its overall size. Although it is large when