By the way, it received ATF approval under the BHO admin.
It was marketed as helping people who had disabilities.
link
https://www.cnsnews.com/news/article...administration
snippets
On June 7, 2010 -- about a year and a half into the Barack Obama administration -- the Bureau of Alcohol, Tobacco, Firearms and Explosives issued an opinion letter, giving the go-ahead to an after-market accessory that allows the user to “bump fire” a semi-automatic rifle.
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