Spent a little time last night working on my back right white dot that fell off the other day. S&W is going to send a new site, but I wanted to do some shooting today and decided I would try a small dot of auto touch up paint. Worked great the touch up paint came with a ball point pen attachment and placed the gun in the vice no worries. Got to the range got half way through my first clip and noticed that my back LEFT dot was missing. This gun has less than 600 rounds through it and now I know that I need a new back sight.