I have the Magpul Gen 1 MBUS on my SBR along with the T-1 in an LT-660 (tall) mount on my SBR. I shoot with my nose to the charging handle, and the bottom rim of the T-1 is visible through the small aperture. It takes up a big chunk of the bottom half of the field of view with the large aperture. I wouldn't call the combination ideal. You'll see less of the T-1 in the sight picture if you shoot with your eye farther back from the rear sight

I plan to give the KAC mount a try next month. It's slightly shorter than the LaRue and comes with two spacers to tailor the height. You can see it compared to the LaRue and by itself.

—Andreas