Leupold has removed this gem from their website but this used to be posted under the FAQ section.
"Leupold uses foreign sourced components for some parts of Golden Ring products, primarily lenses. This is because at this time, there is no American manufacturer that can supply the quantity of high quality lenses that Leupold needs for its annual Golden Ring Optics production. Leupold’s lens systems are designed at Leupold, by American optical engineers, in its state-of -the-art optics lab and then procured from outside vendors who must meet stringent quality standards.
Incoming parts are carefully inspected in our testing facility before they are accepted into the assembly process. Incidentally, all major optics producers worldwide acquire some or all of their glass from the same sources as Leupold. Some of these sources are located domestically, some are European, and some are Asian. Leupold has acquired its lenses this way for over 50 years...
The important part is they use foreign sourced comopents for PARTS, that means more than just lenses. If Leupold was sourcing lenses from Schott or a well known Japanese company then they would be proud to tell you which one. They don't say where it comes from just that some is European and some is Asian. Well Asian includes a large continent which means they don't even want to narrow to the region beyond that level. The answer is China and the Philippines for glass and likely China for anything else. Leupold scopes are assembled in the USA, not made there.