I bought a nice older model 63 Stainless steel kit gun with the 6 shot 4" barrel. It has the reddish orange resin insert in the front blade.Im not sure I like that color contrast as its a bit light in color to line up the top edge with the rear sight blades top edge.But more importantly when I measured the thickness of the front blade it came out to .128" thick and the rear sight notch is .125" .So there really is no light on either side of the front blade when viewing thru the rear sight.Why did S&W do this ? Now I have to send this out for more money to get it corrected and its not cheap .Shipping alone is $70 to most Smiths for next day air which is a requirement.