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which optics are on the better side and made in the USA?
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You'll have tp define "better side."
Nightforce assembles all of their scopes in Idaho, but on many of the scopes the primary core components may be manufactured in Japan.
Leupold manufacturers their scopes in the United States. However, most of their glass is sourced from Europe or Japan.
US Optics manufactures their scopes in the United States, but a lot of the glass is Schott Glass from Germany.
Swift manufactures their scopes in the U.S. and may use some U.S. glass.
Optical glass is one of those things that is difficult to manufacture without a lot of highly specialized equipment. Even Leica gave up manufacturing glass.
Leica designs the glass formulations, has the glass manufactured to their specifications by several German glass manufacturing firms. The glass blanks are then ground, coated, and the lenses assembled in the Leica factory.
I'm not surprised that most of the U.S. scope manufacturers source their lenses from outside the United States.