I have a Model 19-5 or 6 ,there is a spot on the number so I can't be 100 % sure which. I got it from my Dad who got it from on old LEO friend of his. I always thought 19's were 357 Magnums but on the side of the barrel it has 38 S&W Special CTG. Also the ejector shroud does not cover the ejector rod like most 19's.Was this a special LEO makeup S&W produced ? The cylinder is the same length as my 686 is it possible to change the barrel? Any info would be very helpfull.