I lucked out and found some old S&W front sights from an estate sale ( D- S&W Red Post blade)
A couple of ramps and a red post blade... Removed the blade from my 7 1/2" 657 then filed and fit the red post and drilled the pin hole. My eyes need all the help they can get so with the red post and W/O Rough country rear I now have a 50 yard iron sight system I can see..