But to get back to the OP, any impartial consideration of the FN FAL at the time of its development should have led to its acceptance by the U.S. military. The fact that it wasn't was due to military parochialism and myopia. Makes me wonder how the Korean War would have turned out if the U.S. forces had been equipped with it.
The use of the terms "impartial consideration" and "by the US military" in the same sentence are an oxymoronic statement as we both know. Particularly in the 1950s. There was no way the FN-FAL was going to get a fair hearing. It would have needed to be up against a weapon that frequently jammed, was uncontrollable on fully-automatic and had poor quality control and was unuseable to even get a remote chance. Oops, oh...