Then the front sight post
would have still been "almost even with the ears of the front sight base" even with an F-marked front sight base and a standard front sight post because
there is no difference in the overall height of an F-marked front sight base compared to a standard front sight base. The only difference between the two front sight bases is the height of the sight “shelf” above the top of the barrel.
http://www.box.net/shared/static/uei1uar8kw.jpg
http://www.box.net/shared/static/2d520zm04w.jpg
....