AirPower Workshop talks about which MOSFET that can be installed on AEGs for Milsim events in this video... "This G&G Top Tech Airsoft AEG gets upgraded with a Jefftron Leviathan Optical V2 MOSFET and I don't really talk much about it apart from some basic impressions of the installation. My thoughts summarised: seems robust, great features, pain to install in some gearboxes."