I bought an XD way back when I was at Quantico. I've been extremely happy with it, as it has been the best handgun I've used, in terms of comfort, fit, and function, definitely better than those beat up M9's!
I did have a problem with it malfunctioning recently, but after 9 years of use I wasn't terribly upset, and I sent it in for warranty service as well as some custom upgrades at their workshop. They got it turned around in well under the 5 to 6 weeks I was quoted, and I'm ready to test it out this weekend.
If you find another occasion to get him something, tritium sights are a nice upgrade!
Why can't he take it to Pendleton btw? When I was in the barracks, they let us check our personal weapons into the armory.