Not sure, maybe one of the newer Low Radar Crossection ??? that have all the flat stealth type surfaces. And Phased Array Radars.
I could be wrong, it was well over a year ago. I was in an Induced Coma back in 12/2016 - 01/2017 so the Old Memory is not what it used yo be.
I am not trying to badger you. Honest.
I am fascinated by the rail gun tech, that’s all.
Wishing good health. We are all going to need it.