To buy sights for the XDS: Sights - xd-hs2000 Since the XDS comes from the factory with the same height sights "G" as most all of the other XD & XDm`s there is already aftermarket sights that fit this new pistol. Springfield was wrong and the dovetail was not different on the on the XDS. There are at least a dozen members already using aftermarket sights on their XDS`s with no reported issues. When using the Trijicon HD`s on the XDS use a combat sight picture. Put the rage front dot in the cut out of the rear.....this will line up all three dots. Put the center of the front dot on what you want to hit. To make a head shot put the front dot covering the nose to hit the nose. You use the truglo TFO`s the same way. Combat sight picture. The Trijicon HD XD specific version does not look right on the small XDS slide. The rear sight sticks out off the back of the slide and the gap is kind of wide. But Trijicon HD for the Sig Sauer & XD fits nicely on the slide. This target represents the XDS being shot with factory sights and Winchester white box 230gr RN. My pistol shot to the left constantly at 10 ft, this is not an error on the shooters part since the group was always tight, but to the left. When I moved to 20 ft the groups moved to the right. All three versions of the XD factory pistol sights from right to left: Classic XD, XDS & XDM. My copy of the XDS came equipped with the "G" marked rear sight. The "G" marked factory sights come on almost 99% of all XD series pistols no matter the barrel length or calibre. The XDS has the same dovetails as all other XD and XDm`s. The Truglo TFO`s fit the XDS pistols but did require some fitting before installation.