Yes Sir-the Trooper models I think were one of the best double-action revolvers made by any manufacturer. I have a Mark III, which is one-step behind the Mark V in the development of the gun. Think the only main difference was in how long the hammer arc was. They shortened it up in the Mark V. I'd have to go back and reread old magazines or the yearly Colt Catalog for any other changes, although if there was any, it was pretty minor i think. I carried mine for most of the 21 yrs I wore a badge, check out 'Favorite Duty Gun' page 5 in the Bold Chambers for more info on it, I customized it after carrying it for several years. I think if Colt had had a better marketing program (up to the par of S&W's) it would have been more popular and seen more duty use by Police Officers. Back in it's day, I think it was a better shooter than Smiths Mod 66 which was a big seller until the Smith 686 came along(I had to carry a '66 for a couple of years). I could double 'tap' a full 'wheel' of duty 357 140 grainers into center mass at 10-15 yds with my Trooper and ya could cover all six with yer hand-the lighter Smith 66 was more recoil sensitive. Not braggin, but pointing out that there is a price to pay when taking weight from a guns mass. Colt should still be makin 'em, but Colt should have done alot of things differently.