The Swiss experimented with scoped sniper rifles during World War II, and the results were the K31/42 and the K31/43. Only a couple thousand were made between the two models, and they were not considered particularly successful. Ultimately they were replaced by the ZfK-55 (a much better rifle for the purpose) a decade after the war. The two earlier versions are pretty interesting to see though - I had the chance to look at examples of both types at Simpson Ltd in Galesburg, Illinois.
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