You may want to check with Seitz or perhaps someone can weigh in here. . Its a #4 but I do not know what the distinction is between a regular 4 and a special.
I currently shoot a #2 special rib. Richie makes ribs that are increasingly tall in front so that you can have a more heads up position but not such a high shooter. Could you measure the distance from the top of the notch to the top of the rib (not bead)? I'll measure mine too. jk