A now deceased, ex brother in law brought me a Nylon 66 in a paper grocery bag once and asked me if I could put it back together for him. He decided he wanted to take it apart and clean it. I asked him if it was jammin on him before he took it apart and he said no. I asked why he took it apart, and he said he FIGURED it needed cleanin. A couple weeks later I took it to him still in the grocery bag. It was a night mare to try and figure out with no schematic.
Apparently these little rifles are like the energizer bunny, they just keep going and going. If you don't take them apart.