Iowa Senators Introduce State Assault Weapons Ban Legislation has been introduced in the Iowa Senate that would prohibit the possession of military-style, semiautomatic assault weapons in Iowa. ..."
Lead sponsor of the bill Mike Connolly said, 'Military-style, semiautomatic assault weapons pose an unreasonable risk of death and injury to all Americans, but the risk is greatest for the nation's law enforcement officers. A law enforcement officer is far more likely than a member of the general public to look down the barrel of an AK-47 whenever they serve a warrant, stop a suspicious vehicle on I-80, or respond to a domestic disturbance.'
See :
http://coolice.legis.state.ia.us/legislation/Bills/SenateFiles/Introduced/SF207.html