Vince of Godfather Airsoft shows to us in this video about the Bravo MOSFET units that are available at their online store. There benefits to having a MOSFET installed in AEGs as you can easily reconfigure the firing modes and increase efficiency for the gearbox. The Bravo Advanced MOSFET units have built heat sinks and is very tolerant to bad wiring especially when your receiver's shell would only allow you unusual wiring to fit it in.

You can check the Bravo MOSFET units at Godfather Airsoft.