I have had two sets of these sights now, and both the first set and the replacement set (that I waited a MONTH for) are crap. Neither front site worked? I purchased them due to having them on my M&P and thoroughly enjoying them. Now I can no longer endorse this product. They are crap. A agree with the other posts the front sight never illuminated! I am currently waiting for Kimbers response to my THIRD!!!!! request to rectify the situation, but I am no holding my breath.
This review was written in the old system and had content requirements that are different than reviews written today.