One of the great things about military arms is interchangeability. You have a dozen broken rifles and from those broken rifles you can make half of them serviceable because all the parts fit the same. Any 03 part will fit Any 03 any M1 part will fit all other M1's and the same with the carbine the BAR nd to some extent the Thompson. So in my humble opinion it the part fits and functions properly it's the right part.

---------- Post added at 11:37 AM ---------- Previous post was at 11:34 AM ----------

An odd thought. I wonder if seventy years from now there will be a bunch of guys discussing if that M16icon is an A1 or an A3 model and are all the parts correct.