Boomer, it depends. Colt made two Troopers, first generation which were essentially Colt I frame revolvers (Police Special and Python were the same frame and lockworks; leaf spring, and they are both descendents of the Army and Navy models, on the .41 frame). Later Troopers were the Colt J frame MkIII (came out in '69 I think, but my memory is getting old and foggy), with coil spring lockworks and sintered metal trigger and hammer (a part that commonly breaks). Basically Colt's attempt to build a cheaper revolver to compete with the S&W Highway Patrolman and Model 19/66 (which, because they had less hand fitting then the I frames, were cheaper at the time). The later MkIII models were the ones which Colt marketed as the Border Patrol, and yes, these are a version of the second gen Trooper. Incidentally, that coil spring lockwork "cheap" Colt went on to become the Mk V, which in turn became the King Cobra which when scaled up a tad became the Anaconda. Colt also made a fixed sight version of the MkIII and MkV revolvers called the Lawman. I'm still looking for a MkIII Lawman snubbie, a 2" bbl'ed 357 is a joy to behold. If anyone has one they want to be rid of, drop me a line. - dan