Something you may not have on file, very handy when sneaking up on projected heights.
Formula.....
Overall sight radius X .00029 = 1 MOA value in .001"
GTC
I figured cross would have the dope.
I'm thinking something like a Redfield Sourdough blade....but that's just me. My preference is like Jeff's; black, solid and square. A target handgun sight, square notch rear.