Published: 05/13/2014 06:52:07 PM
�Unfinished receivers� that can be used to build guns pose problems for law enforcement. Dimitri Karras, CEO of Ares Armor in Oceanside, California, is fighting back against the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). The ATF claims that Karras was selling receivers, also called "blanks," which may qualify as firearms and need to be regulated. (Casey Capachi / The Washington Post)