Was looking at a XD subcompact yesterday. I noticed something funny. The magazine had a wierd extension on the compact mag. It was just enough for the pinky to lay on. It felt great, but would barely do anything to hinder the conealment. It was a pearce magazine extension. I think these will be going on all the compact magazines that I have when I get my Subcompact. VERY NICE.
http://www.pearcegrip.com/springxd.htm