Why would someone go to the trouble & work involved making a Model 58 to have an adjustable rear sight when they could just buy a Model 57? Ya see, now that I have recently acquired an M57, my 1st S&W .41 Magnum, I'm a seasoned pro with the S&W .41 Magnum! (Okay, that was just a joke...ha ha ha...pffffttt!)
Now, in the seller's defense, the factory accidentally punched the wrong model number on it, then the stocks putter-on-er put M58 stocks on it.
Or, we can just call male bovine waste product and move on!
505Gibbs, if you have some extra cash laying around, drop some cash and show us your new-to-you revolver. (Easy for me or anyone else to say!!)
Again, I'm not a .41 S&W professional!! Jeff T.