I plan to put a R3 Max on my P226 X-Five STAS. I’m a little bummed that the X-five uses the Delta Point Pro footprint and cannot directly interface with the optic’s Max footprint. I believe that Springer Precision makes an adapter plate.
https://shop.springerprecision.com/o...sauer-p226-x5/
I’m still waiting on a Romeo 2 (dot circle reticle) that has been back ordered at EuroOptic since December. That one will go on a P226 X-five Legion. That one should directly mount to the DeltaPoint Pro footprint and the optic’s integral rear sight should work perfectly with the taller factory front.