Which scope manufactures can put the “Made in America” label on their box?
Curious about that too. Good question and I apologize if I overlooked the answer to it.
I don't have an exhaustive list. But some of Trijicon's optics (ACOGs, VCOGs, RMRs) meet the criteria and sport "Made In USA" on them, while other Trijicons are "Made in Japan." Night Force has some high end scopes that do as well. The NF USMC sniper scope that retails for over $5,000 is "Made in USA." There's probably others but "Made in USA" doesn't come cheap and they are almost certainly going to be high dollar scopes.