I got myself a LaserMax guide rod laser for my duty pistol (XD40 service) a few months ago. Went out to the range to make sure it was sighted properly. Ran the standard LEO course we run every six months. The department has some pretty strict rules about this, so I have to requalify with this (because it's a mod to a duty pistol) before I can carry on duty. I shot the standard set of qualification runs, using the same type of rounds we always shoot (165 grain, 300 rounds at distances from 25 yards down to 3 yards, slow/intermediate/rapid fire, timed/untimed, standing/kneeling/prone, stationary and moving). What I found was anything over 10 yards shot low. At 25 yards, I was about 18 inch's low POA/POI. As I moved in toward the target, the POA/POI grew less and less, until at 10 yards, POA/POI was acceptable. I cleaned the pistol and reinstalled my OEM recoil spring assembly (have approx 15K rounds on it) and reshot the course (the department supplies the ammo, so I wasn't out of pocket!). POA/POI were back to normal. Has anyone had anything like this happen with a LaserMax? I tried contacting them, but got no real answer.