I've found the flip up front sights on the Mossberg rifles rather unique.
My 46B-B has the adjustable peep sight on the receiver and four different flip up front sights.
My front sights consist of one narrow post, one wide post, one post with bead and an aperture front sight.
I recall in the days of my youth I would see a lot of the old Mossberg rifles, it seemed almost everyone that lived on a farm owned one.
I don't see many of them around anymore, even at farm auctions.