XD-S Mod 2 adapter plate is now in stock. We had no idea, but our Hellcat also works for this platform to pair a Holosun 407K 507K or EPS Carry. Due to the design of the gun and optic, it will not co witness, but allow you to add these to the platform.
We include everything to install the optic including the shorter lengths for the Holosun EPS Carry, a Torx bit, and a small tube of Vibratite.