duty optic height
The Aimpoint CompM5S and Duty RDS are 10mm (0.393") taller than the Comp M5 and Micro T2, which must be factored into the final height of the optic. On a 1.54" mount the additional 10mm will result in 1.93" effective height. On a 1.93" mount the additional 10mm will result in 2.32" effective height. AR height iron sights will not be visible through the window underneath the mount in this configuration