Bump stocks make semi-automatic guns behave like fully automatics. Subscribe to our channel! http://goo.gl/0bsAjO When a gunman opened fire on a crowd at a Jason Aldean concert in Las Vegas earlier this week, he was using a legal firearm. In the United States, semi-automatic weapons are available to the general public. Fully automatic guns are not. But there is a loophole. Gun owners can purchase a 'bump-stock' modification that takes advantage of recoil mechanics to make a semi-automatic rifle far more dangerous. And that opens up a grey area in gun control policy. For more on this topic, you can read Vox's German Lopez: https://www.vox.com/policy-and-politics/2017/10/4/16412910/automatic-guns-las-vegas-shooting Vox.com is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. Check out http://www.vox.com to get up to speed on everything from Kurdistan to the Kim Kardashian app. Check out our full video catalog: http://goo.gl/IZONyE Follow Vox on Twitter: http://goo.gl/XFrZ5H Or on Facebook: http://goo.gl/U2g06o