Interesting tidbit about the magazines! One of the things I noticed when I picked mine up yesterday was "dam those floorplates look brand new." I'm very satisfied with the one I got, especially since I've wanted one since I first saw them.

You mention that they all have a very thorough annual PM done, do you know if there are any mandatory replacement parts (recoil springs for example) or are wear items replaced when they start to go bad (magazines failing to lock back, etc). Thanks!