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Bump stock

The meaning of «bump stock»

Bump stocks or bump fire stocks are gun stocks that can be used to assist in bump firing. Bump firing is the act of using the recoil of a semi-automatic firearm to fire ammunition cartridges in rapid succession.

The legality of bump stocks in the United States came under question[1][2][3] following the 2017 Las Vegas shooting, which left 60 civilians dead and an additional 867 injured;[4][5][6] the gunman was found to have fitted them to his weapons.[7] Several states passed legislation restricting ownership of bump stocks following this shooting and the one at Marjory Stoneman Douglas High School months later. The U.S. Justice Department banned them at the federal level in December 2018. However, on March 25, 2021, the Sixth Circuit Court of Appeals struck down the ban.[8]

Bump fire stocks are gun stocks that are specially designed to make bump firing easier, which assist semi-automatic firearms with somewhat mimicking the firing motion of fully automatic weapons but does not make the firearm automatic.[9] Essentially, bump stocks assist rapid fire by "bumping" the trigger against one's finger (as opposed to one's finger pulling on the trigger) thus allowing the firearm's recoil, plus constant forward pressure by the non-shooting arm, to actuate the trigger. Bump fire stocks can be placed on a few common weapon platforms such as the AR or AK families. They can achieve rates of fire between 400 and 800 rounds per minute depending on the gun.[1] By 2018, bump fire stocks in the United States were sold for around $100 and up, with prices increasing prior to enactment of federal regulation.[1][10]

Slide Fire Solutions, the inventor, patent holder, and leading manufacturer of bump stocks, suspended sales after bump stocks were used in the 2017 Las Vegas shooting and resumed sales a month later.[11][12] On May 20, 2018, 95 days after the Stoneman Douglas High School shooting, Slide Fire Solutions permanently halted sales and production of its products.[13]

In 2002, one of the first bump stock-type devices, the Akins Accelerator invented by Bill Akins, was deemed by the US Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) to not be a "machinegun". The Akins Accelerator used an internal spring to force the firearm forward to re-make contact with the trigger finger after the recoil of the previous shot pushed the firearm rearward.[14][15] The ATF interpreted a "single function of the trigger" to mean a "single movement of the trigger", and since the trigger moved for each shot, the Akins Accelerator was deemed to not be a machinegun.[15] Later, in 2006, the ATF reversed course and reinterpreted the language to mean "single pull of the trigger", which reclassified the Akins Accelerator as a machinegun. The Eleventh Circuit Court of Appeals upheld the new interpretation in February 2009.[16]

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