The answer is..........drum roll please.........NO. I tried the XDM40 mags in my XD and they are wider mags to fit more rounds I guess. You only gain 4 rounds or so anyways so just get good at changing mags.
DON'T BUY DELL!!!!!
BEWARE!!! The toes you step on today may be connected to the ass you kiss tomorrow.
I was think n that i could reduce the handle length and put a 16 round clip with xtention, instead of using the 19 round clip. Then i could have the compact with a shorter grip with more room for my finger and more rounds.. guess i'll have to wait until someone comes up that idea and produces a 16 round clip that fits the xdm with a extention.