For anybody who has done it, they already know that taking apart the Ruger Mark I and Mark II pistols is fairly easy. Putting them back together is a real pain in the neck. Unless, of course, you know exactly how the parts are supposed to fit. The gunsmiths at Clark Custom Guns show you step-by-step instructions on how to disassemble and then reassemble these pistols. Complete, information detailing nomenclature and how the parts function.