not good enough
Elevation adjustment range is weird - it had to be bottomed out to regulate with Springfield's front, and yet there is a lot of travel left. The moving part is exposed, and pressing on it makes the adjustment screw loose. So it basically does not hold zero very well. First that I ordered was defective - had a lamp of metal in the screw well which prevented it from going all the way down. Second is better, but the lamp, although smaller, is still there. Seems to be a manufacturing artifact. Overall, both design and quality are less than ideal.
