Hello all. I recently bought an XD and have put roughly 200 - 250 rounds through it over 3 sessions. The last 2 sessions I noticed my placement drastically off. While inspecting/cleaning after this last session I noticed the front sight to be very loose - I can touch it with slight pressure and it slides back and forth. It only tightens up near the ends of the slide. Curious if anyone else has experienced this or if this will be a problem for future sight upgrades. Thanks for your help.