yes it fits from Viridian website see *******The Viridian REACTOR R5-R Gen 2 red laser sighting system for the ******8Springfield® XDs and ******XDs Mod 2 9/40/45. This laser sight is easy to install and blends seamlessly into the trigger guard for invisible profile and smooth draw. Viridian’s red lasers utilize a 635-650nm laser wavelength to generate the brightest, sharpest red dot possible. These lasers feature 2 modes of operation (constant and strobe) and up to 12 hours battery life.
The new gen 2 models feature a new INSTANT-ON ambidextrous, inside the waistband (IWB), custom fit holster with INSTANT-ON activation. Made of microfiber, this holster is more comfortable and durable than the previous models. The INSTANT-ON activation ignites the tactical light the moment you draw. No buttons, no squeezing, no doubt. When you draw, it's on.
https://viridianweapontech.com/products/reactor-r5-gen2-red-laser-sight-for-springfield-xds-9-40

Hi Stephen and welcome. Yes Sir it does. Cheers and stay safe!