Bought my XDM 9MM & had to have the custom shop work on it to shoot to point of aim - also had a fiber optic front sight installed and they matched the barrel. Now it shoots w/4# trigger and virtually no reset length - SWEET! Bought it primarily for practical shooting - too big to carry concealed. Said I would sure like to see it in a compact 45 for carry. Then, I compared the 9MM 3.8 with the 9MM 4.5, and was surprised to see the only difference was an inch in the slide, with the grip the same. Now, am rethinking my wish for a 3.8 in 45, since the grip will be the hardest thing to conceal. Guess I'll stick with my Sig P245 as primary carry.