
FILE - A handgun frame that has been printed on a 3D printer is held for a photograph at the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF), National Services Center, March 2, 2023, in Martinsburg, W.Va. (AP Photo/Alex Brandon, File)

FILE - A handgun frame that has been printed on a 3D printer is held for a photograph at the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF), National Services Center, March 2, 2023, in Martinsburg, W.Va. (AP Photo/Alex Brandon, File)