No dovetail on the 5.25".Sights | Springfield XD OEM and aftermarket parts store
Springfield, XD, XDM, XDS, Sightswww.xdgunparts.com
Give these dovetail mounting plates a look. Another option is to find a place that will mill or cut the slide to adapt an optic. It's a lot more expensive though.
I chose to have my slide milled so I can have iron's co witness with the optic. So far the Vortex Venom has proven resilient to my XD Mod2 .40.
No dovetail on the 5.25".
Adjustable rear sightI've learned something new today.