All parts are made in the same factory in japan. Nigtforces are either assembled in the USA or put under intense QA/QC in the US. That's what you're paying for with nightforce. If it's out of any kind of it's very tigh tolerances it doesn't pass.
So the to answer your questions only two countries involved US and Japan. Japanese make all the components. The factory that's it's made in is starting to gain on the heels of European scopes.