Are Brass Knuckles Illegal in Idaho

In Idaho, brass knuckles are legal to own, but illegal to use in a criminal act. The state does not specifically ban possession, meaning you can keep or carry them.
However, Idaho Code §18-3302 makes it a crime to use any deadly or dangerous weapon — including brass knuckles — in a threatening or violent way.
If used responsibly or kept as part of a collection, you should have no legal issue. Still, be cautious in cities with their own ordinances, as local rules may differ slightly from state law.

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