I wondered that myself, as the tip is distinctly shorter that the other three sections, but the eyes don't appear to be spaced incorrectly and the tip when assembled seems to be just fine. So the short answer is I really don't know.....that is why I posted it's length.
I remember having a Fenwick FS 79 that I won in a skeet shooting contest, so I thought perhaps that figure was a common one for Fenwick. I just have to shrug my shoulders.....don't know.