Okay, somebody had to say it- this is beginning to resemble the std "Is my M-1 Carbine correct?" question, followed by 79 pages of explanations why it is completely and utterly wrong, all while missing the one guy who points out that it got manufactured, issued, reworked, re-issued, and used in multiple configurations by the military thus instantly making the gun "correct", and the entire question pointless.
The gun is not incorrect, it's just that the wrong question is being asked. The question needs to be "What features are evident in my guns' current configuration, and how do those features relate to known variants?" Remember, your gun would've been "factory correct" only on the day it left the factory, if even then as no usable parts were knowingly wasted.
Trying to put a particular gun back to its "correct" appearance is totally ignoring the reality that that kind of exercise goes directly against what the using military actually did with them, they only cared about assembling functional weapons and comportment with some idea of keeping all guns as they left the factory simply didn't happen. So, the quest for "correctness" in restoring your guns current appearance goes against history, reality, and common sense.
There is a vast trove of practical and historical knowledge available here, just don't misapply it to things that don't need correcting. There are already enough horribly inaccurate museum exhibitions all over!
-TomH