“Boeing/Sikorsky has yet to unveil their SB-1 Defiant demonstrator for this project.”
https://www.youtube.com/watch?v=xh7F3PvqOl0 AUSA 2016: Flying the SB 1 DEFIANT Sikorsky-Boeing (FVL Prog)
https://www.lockheedmartin.com/en-us/products/sb1-defiant-technology-demonstrator.html