A couple of similar setups:
84m 7-08, Warne Maxima bases with the slot opened up, Burris XTR Sig Med
FC 6.5 Creed, Talley 0MOA pic rail (rear is quite a bit lower than the 20MOA rail), Burris XTR Sig Med
8400 7WSM, Warne Maxima with slot opened, Burris XTR Sig Med