In support of Peter's fair comment, it must be noted that the post makes no mention of "2 inch ..." and the photo does not show the entire assembly, cutting off before the end.
Looking carefully at the photos, it seems to me that if the front ring was attached to the scope behind the turrets, this would permit the rear ring to be mounted two notches further forward on the rail, and this would remove the large overhang of the scope to the rear. How about it?