Don't waste your time. Those optics aren't true 1x so you will never get a clearly focused front sight to allow you to cowitness your BUIS. Not to mention, the eye relief is short so either your stock will be almost collapsed to the shortest length just so your scope can be ahead of the rear BUIS or your optic will float over your rear BUIS where you can't flip it up.
Your only other option if you do want to use BUIS is to get offset rail mounts for them or offset sights.



























