I had the same problem as Dave. No matter what I did I couldn't get the sear to release. It seems that the trigger could not be drawn back far enough. I also had trouble releasing the trigger in order to field strip, having to hold the trigger all the way to the rear while jiggling the slide vigorously several times before it would finally release. I solved these problems by filing the back of the trigger just enough where it comes into contact with the frame. Obviously I went a little at a time and had to re-install the trigger several times until I got it to work. It works great now. I have both the XDS .45 3.3 and an XDS .45 3.3 Mod 2. I installed the trigger on the Mod 2. All that being said you can always expect because of manufacturing specs to have to do a certain degree of fitting on after market parts. The fit, finish and overall quality of the trigger is outstanding. It really is a nice looking unit that adds to the appearance of the XDS. I can't tell whether it made a difference or not as I also polished the sear, disconnector and bottom tab on the striker where it comes into contact with the sear which probably made more of a difference. I would definitely order parts from Overwatch Precision again. They sent my order out upon receipt and again the quality of the trigger was outstanding.