Add source, author, and license attribution block
m Added missing license and category.
 
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==Summary==
Glock-pattern pistols fitted with a rear backplate auto-sear conversion device (a "Glock switch"), an ATF image.
Glock-pattern pistols fitted with a rear backplate auto-sear conversion device (a "Glock switch"), an ATF image.


Source: https://commons.wikimedia.org/wiki/File:Glock_Switch.jpg
Source: https://commons.wikimedia.org/wiki/File:Glock_Switch.jpg <br />
Author: Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF)
Author: Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) <br />
License: Public domain (ATF, US federal government work)
License: Public domain (ATF, US federal government work)
==Licensing==
{{PD-USGov}}
[[Category:Files]]