A buddy of mine's father used to work at Piccatinny Arsenal in NJ. They
specialize in artillery/missile research and development for the US Army.
He told me that they were attempting to mount a railgun system on a
tank chassis before he retired. The interesting thing was that the system
used an alternator powered off the turbine instead of batteries.
The primary advantage of this system is that you didn't have alot of
dangerous potential energy sitting inside the vehicle as you would with
batteries, but the alternator would spool up extremely quickly taking power
off the jet.