Image: Plot of rising US mass killings since 2004 end of assault weapon ban--

[tblue37]

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Plot of rising US mass killings looks like one of those deadly rainbow jelly fish. Great @FT curtain raiser on the NRA's upcoming "freedom-filled weekend for the entire family". https://ft.com/content/aa5fe164-bae9-4293-97b0-78f8369aadd6

[Kaleva]

1. Handguns are by far the most common weapon used in mass shootings.

https://www.statista.com/statistics/476409/mass-shootings-in-the-us-by-weapon-types-used/

[scipan]

2. Semiautomatic

Several types of guns have been used in mass shootings in the United States. A 2014 study conducted by Dr. James Fox of 142 shootings found that 88 (62%) were committed with handguns of all types; 68 (48%) with semi-automatic handguns, 20 (14%) with revolvers, 35 (25%) with semi-automatic rifles, and 19 (13%) with shotguns.[81][82] The study was conducted using the Mother Jones database of mass shootings from 1982 to 2018.[83] High capacity magazines were used in approximately half of mass shootings.[84] Semi-automatic rifles have been used in six of the ten deadliest mass shooting events.[85][86]

https://en.wikipedia.org/wiki/Mass_shootings_in_the_United_States

Older study, but probably because data is hard to get since it was banned until recently.

73% semiautomatic