Many of my gun projects, both those I've shared on here as well as those I haven't, involve taking a non-traditional view on a particular pistol or rifle. For example, what would a futuristic revolver look like?
These projects typically require thinking outside the box - finding a part that is used on a rifle and retro fitting for a pistol, taking a piece of electrical equipment and making it serve a new function on a gun, etc.
My revolver projects usually include the addition of an optic; frequently a red dot, prism scope, or a low magnification pistol scope. It's pretty easy to find good information on how to mount a pistol scope. It's not easy to find information on how to mount a red dot on a specific revolver be it a Smith & Wesson, Ruger, Colt, whatever.
So here's a starting point for mounting those looking to mount a red dot on a revolver, based on what I'm come across on my various gun builds. The point isn't to convince you which is the best mount and red dot for your specific .357 Mag, .45 Colt, or whatever, revolver. Rather, it's to give the person interested in adding a red dot to their wheel gun a place to see some of the options.
There are 3 general ways to mount a red dot on a revolver: on a full-length picatinny/weaver rail, on a short picatinny/weaver rail or a dedicated red dot mount. Below is a list of options for each based on gun and red dot desired.
Note - I suspect this post will get out-dated pretty quickly as new options come onto the market. You'll see that there are only a few companies making most of the mounts, so if you don't see an option for your revolver & red dot, head to the manufacturer's site and see if they've added to their offerings.
Second Note - If you're not sure what mount you need for the red dot you want, check out Optics-info's Guide. It's a great resource to know what mounts are compatible with your optic.
Full Length Rails:
Full length rails are nice becuase it's easy to switch to a different optic if you get tired of your red dot.
The downside is that they are the heaviest of the three mounting options and, since they require you to buy a picatinny mount for your red dot, they elevate the optic pretty high above the bore. Some options are:
Short rails typically extend the length of the cylinder. They are less heavy than the full length rails but still require a picatinny mount for your chosen red dot and they push the sight pretty high above the barrel.
Revolver Red Dot Mounts:
Using a red dot specific mount on your gun is the lightest option that also keeps the sight closest to the barrel. However, if you want to switch optics, you'll need a new mount or a rail and a new mount.