(CN) — The last man in America to legally own a bump stock asked the en banc 10th Circuit on Wednesday to allow him to keep the device — which turns a firearm into a machine gun of sorts — until the federal lawsuit challenging the legality of the devices has been decided.

W. Clark Aposhian, chairman of the Utah Shooting Sports Council, sued the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives in January 2019 after the Trump administration instituted a rule change categorizing bump stocks as machine guns, effectively banning people from owning them.

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