My opinion will differ GREATLY from most. If it shoot's great and functions properly in every way then you have a wonderful M1 Carbine. Luckily it's an American Weapon where all the parts are for the most part interchangeable and do not need hand fitted. I say shoot it enjoy it and count yourself lucky that you have a fine piece of American military history. As a side note easily over 50 percent of matching milsurp weapons are forced matched (faked) by collectors (or venders) purchasing stamps. I have some that are all matching, most have been in my family since new so I have the luxury of knowing those ones are the real deal. I have paid the premium a few times for all matching but I never will again. There are no ways to really KNOW if it is in fact all matching. I was almost fooled and easily would have been had it not been a friend. Now if it's period correct I am happy and would only pay a tiny bit more for all matching unless someone could really "Prove" it was all matching. part numbers matching just don't mean that much to me personally.