Yep 20MOA Base and Burris rings. Can’t remember which bushings I used but it is close to the bottom at 100yds.I'd sure like to watch the BRA recoil with that grip.
I'm still starring at the pics. Looks like a EGW base and Burris xtr signature rings. What inserts do you have in them? What is the center to center measurement of the rings on that base. Sorry to drive you nuts with questions .