Thanks for the reply XA--I was hoping to use the Kahles because it's easily the best fixed 4x I've ever looked through, but I fear you may be right. Even if I resigned myself to holding my head upright, I'm actually not even sure an off-the-rack ring exists that would adequately elevate this particular scope on this particular rifle. If someone knows of one, please advise and I'll at least consider it. A friend has a 21 with a straight-tube Leupold, I think a 1.5x4 or thereabouts--I'll probably check his out tomorrow to see how it's all put together.