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Izak, Shultz. Gun Safe Reviews. Shooting & Safety. 26 August 2015 [23 February 2017]. (原始内容存档于2021-01-27).
web.archive.org
Trevino, Abel. "Proper Weapons Practices Key to Ending Negligent Discharge Incidents in Iraq." army.mil. United States Army. 1 March 2007. [1] (页面存档备份,存于互联网档案馆)