Aside from the Novak sights which are available for the CZ52, I've found that some stuff called SiteGlo works pretty well. I heard about it online, and saw some lofty claims on their website, then I found some viral marketing that the guy tried to do which was suspect, but ultimately I gave it a try. I found that putting a couple tiny dots of white nail-polish base-coat on the rear and front sights before applying the SiteGlo really helped it to stand out and look brighter as opposed to going straight on the dark frame. The glow lasted about 30 minutes top at it's initial brightest, and sort fades away completely in one hour. During daylight it has a phosphorescent yellow/green tinge. Will try to post photos when I get home....