The Mark I is simplicity itself. Other than the trigger, the only controls on it are a two-position safety that doubles as a bolt lock, cocking serrations on the back of the bolt, and a hook-style magazine catch on the bottom of the frame. However, there is one significant exception to the Mark I’s elegant design. Try to field strip it for a thorough cleaning and you’re in for one heck of a chore that involves banging, cursing, and a sequence of movements during reassembly so complex, you’ll wonder if you’re putting together a pistol or initiating a nuclear strike.
Over the years, Ruger introduced the Mark II and, later, the Mark III series, each with various refinements and enhancements. But cleaning them still remained a Herculean task. Well, no longer.