Picatinny rail for S&W 19 revolver

I've been using red dot sights for around twenty-five years now. I have them on most of my handguns. I hunt with handguns and I shot a LOT of competition with handguns for many years. I have NEVER had a battery go dead while I was using a red dot. Today's red dots have batteries that last a very, very long time. Changing the battery once a year is about all you have to do to insure it won't go dead. Most of the sights now (the better ones) go into the off mode when not being moved for a period of time or putting the covers back on them. Trying to mount a red dot in a manner to allow using the iron sights just isn't going to work very well. The red dot would sit so high it would create problems carrying the gun in a holster, holding it to shoot, and look quite ungainly. Can it be done? Yes. Does anyone do it? No one I know, and I know a lot of people who shoot with them. It works OK on a combat rifle, it just doesn't have any place on a handgun. That's just my opinion, so you're free to do what ever you please. I don't think you're going to like the end result for function or esthetics. Think about it for a while longer before doing anything.