Update Mar 17, 2020: I tried this at the range and found that I forgot the account for the little indicator that lifts up when there's a round in the chamber. You'll want to make a little notch in the bottom of the rail for it (this may only apply to the v2 design). I no longer have this pistol, so I can't measure to edit the model.

Optic mount I made for my Springfield XD Mod.2 (it may fit others, but I haven't been able to check). Mounts to the rail on the bottom of the front of the gun and gives you a rail on top. I haven't had a chance to try it at the range; I won't be held responsible for any optics that take a fall. ;) The black part is v1, orange is v2. v2 has flat sides for added strength/reduced supports, countersunk holes for M3 screw and nut, and a longer rail.