I have a 4-inch Model 19-5 that I bought about 25 years ago. Its still my "go to" home defense gun. The only thing I have done to it is replace the beautiful wood grips with Crimson Trace laser grips. But I think it is far too big for concealed carry. I don't get to carry often since I live in IL and only carry when out of state, but when I do its either a S&W640 (concealed hammer, 2 inch barrel, DAO) or my little Ruger LCP. The 640 has only 5 rounds but I have 100% confidence it will go bang when I pull that long trigger pull. I have a N2 Tactical IWB holster that is comfortable and holds the gun well.