So, I picked up a Springfield XDM in .40 recently, and I've read online that if you dry fire them a lot the striker retainer pin can break. Anyone have experience with this? I'm thinking of ordering a Powder River Precision replacement pin (supposed to be stronger) and installing it as a precaution, but I'm wondering if its really necessary....

Also, does anyone know if night sights (Trijicon specifically) made for the XD can be installed on the XDM without too much trouble?