I've got them on my 40c. They fit perfectly into the stock sight 'sockets' and after a good 5 second charge, they glow dimly but visibly all night. I'm happy with mine.
Thanks! I'll try them. Nice thing is you get enough for several sights![]()
Just curious.... did you get the Nitesites? thoughts? I was thinking about getting a set to put on my M&P 22.