I'll also answer the question, but with a different twist. When you purchase a carbine, you really don't know the train of ownership. It could be just as it was in service, or it could have had parts swapped out by a dozen different owners in between. With a CMPcarbine, you know the actual chain of custody/US Gov. to you, or who had it in between. That isn't saying that nothing might have been changed while it was in foreign service: it is only saying the the ownership was US Gov. up to the time CMP received it. Some folks place a high value on knowing the history of ownership. Personally, I don't see a lot of added value in that info, but some folks do.