Ruger Mark II Disassembly/Assembly Video
Make Sure It Is Unloaded!
Someone with a manual will have to reply to this with text instructions, (part names and whatnot,) I will do the best I can with the sticky areas.
The main hick-up with assembly of the Mark 2 is the dingle-berry hooked to the hammer and the hammer itself.
Mainly, a trigger pull at the right time solves the first problem most everyone runs into. When that strange apparatus that goes up into the bolt starts to slide out of the bolt hole as levered into position, pull the trigger and the hammer gets out of the way.
The next hurtle is to get that dingle-berry into the pocket of the strange apparatus, when that strange apparatus gets close to the closed position. That is when I hold the gun in a way so gravity lets it drop into the pocket.
Also: When you don't get the dingle-berry into the pocket and close the strange apparatus, things get kinda jammed when disassembling. To disassemble, just hold upside-down while wiggling and the strange apparatus will open.
The main thing to remember is don't force anything, stay calm and when in doubt, trigger pull.