I ditched optilock rings on my Sako and haven't regretted it. Use Leupold Sako low ring mounts and they are lighter and significantly lower that the extra-low optilocks I was using.
Sako Optilock extra low are 28.5mm (bottom of dovetail to mid point of the ring), the Leupolds are 22mm at the same measurement. Picture below shows the rings with a 3-9x36 scope. Eye lines up perfectly.Can I ask how much lower they are than the Optilocks? I also find them very high for a 6x42.
Reason I ask is owner of rifle has experienced the base to ring securing screw of two piece Optilocks coming loose, and is now looking to change, and would prefer not to go down the picatinny route.