"The FBI and designated state and local criminal justice agencies use the FBI's NICS to conduct background checks on individuals seeking to obtain firearms. Persons prohibited by federal law from possessing firearms include individuals who have domestic violence records that meet federal disqualifying criteria. Under federal law, firearm dealers may transfer a firearm to an individual if the FBI has not made a proceed or denial determination within 3 business days.GAO was asked to review NICS checks involving domestic violence records. This report (1) describes the extent to which states identify domestic violence records that prohibit an individual from obtaining a firearm and (2) evaluates the extent to which NICS checks involving domestic violence records are completed before firearm transfers take place and any related challenges in completing these checks.GAO reviewed laws and regulations; analyzed FBI data from 2006 through 2015 on domestic violence records that states submitted to the FBI, FBI total checks and denial determinations, and DOJ firearm retrieval actions; and interviewed officials from DOJ and eight states (chosen based on number of domestic violence records submitted to NICS and other factors). State interview results are not generalizable but provide insights on state practices."