I am on several other firearms forums and anytime there is a thread on Mark series pistols, it turns into an endless rant on how big a PITA take down and reassembly is. My very first handgun was a brand new Ruger Mark I. Nobody had told me that they were difficult to work with, so I never knew. The first thing I did when I got it home was to take it apart to see how it was made and to clean and lube it. I was absolutely amazed at the fact that it could be taken down without a single tool! I had no trouble with reassembly either. I have since then owned a Mark 2 and a Mark3 22/45 Lite and have no trouble taking down any of them. I really wonder if all those folks on the other forums that complain about these fine pistols, could even change the oil in their cars without cross threading the drain plug. There is the Mark IV for those folks.