Hey andyo5, I got my Hi-Viz sights from Midway for about $30. They work on K,L and N frames and pick up available light unlike Meprolites. The Hi-Viz sight WONT help you in a dark port of an indoor range, or in a dark bedroom against an intruder. Not enough ambient light to light up the tube. They work great in well lit environments and outdoors. I tried to cut & paste them to you. I'm a computer novice, so I hope it works.........one eye joe
http://www.midwayusa.com/Searc...i-Viz%20sights____-_