Hardin v. Bureau of Alcohol, Tobacco, Firearms and Explosives, No. 20-6380 (6th Cir. 2023)
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Under the Gun Control Act “it shall be unlawful for any person to transfer or possess a machinegun,” 18 U.S.C. 922(o)(1). The Act incorporates the definition from the National Firearms Act: “machinegun” means any weapon which shoots, is designed to shoot, or can be readily restored to shoot, automatically more than one shot, without manual reloading, by a single function of the trigger. The term shall also include the frame or receiver of any such weapon, any part designed and intended solely and exclusively, or combination of parts designed and intended, for use in converting a weapon into a machinegun, and any combination of parts from which a machinegun can be assembled if such parts are in the possession or under the control of a person, 26 U.S.C. 5845(b).
The ATF, which administers both statutes, previously maintained that a bump stock, which drastically increases a gun’s rate of fire, is not a machinegun part. In 2018, after a Las Vegas gunman used bump stocks attached to semiautomatic rifles to kill 58 people and injure roughly 500 in approximately 10 minutes, the ATF reversed its position by promulgating the Rule, giving possessors of bump stocks 90 days to destroy or abandon their bump stocks.
Hardin challenged the Rule as exceeding the ATF’s statutory authority. The Sixth Circuit reversed a judgment upholding the Rule, noting the rule of lenity in criminal cases and that Congress could resolve the ambiguity.
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