Hello, first time poster and first time gun owner. I purchased one of the new XD-M 3.8 compacts which by the way is a very nice handgun. I purchased mainly to use at the range but I like having the ability to carry a smaller compact gun. The question I have though is the regular XD-M 19rd mags appear to be the same as the extended mag that came with it but where can I find the 13rd mag? The XD sub compact mag is slightly different but it does go in without any problems but I am not sure if it is ok to use it or not. TL;DR - New XD-M 3.8 compact is great but where can I find the 13rd mags? PS. A XD sub compact mag with the pearce grip extension doesn't fit into the gun, at least any way I could get it in. Thoughts?