Yup. LOP hassles. **** buffer tube adapter.
I tried my AR cantilevered Vortex mount. It sites high (also 1.5" from base to center of rings). I'm maxxed out on the cheek riser too.
A buddy suggested I get a longer rail and have it extend back behind the bolt and use the current rings to bring the scope closer to my eye. I'm not too keen on that idea. Besides potentially obstructing the bolt, a bit of an eye sore as well.