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Commerce in switchblades is prohibited in Maryland.
§ 4-105. Transfer of switchblade or shooting knife.
(a) Prohibited. – A person may not sell, barter, display, or offer to sell or barter:
(1) a knife or a penknife having a blade that opens automatically by hand pressure applied to a button, spring, or other device in the handle of the knife, commonly called a switchblade knife or a switchblade penknife…