Under Penal Code 21510 PC, butterfly knives are considered a form of a switchblade and are illegal in California. Specifically, it is a crime to carry, possess in public, sell, or otherwise transfer a butterfly knife. Convictions are misdemeanor offenses that carry up to 6 months in jail. Are butterfly knives illegal in California? In
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Why are butterfly knives illegal in California? - Quora
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Why are butterfly knives illegal? What makes them different from other knives? - Quora
In which states are butterfly knives illegal? Why are they illegal? - Quora
Why are butterfly knives illegal in California? - Quora
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