semi-automatic weapons

Most Americans first learned about "bump stocks," which speed up the firing rate of semiautomatic rifles, in the aftermath of the Las Vegas massacre. A year later, they're still mostly legal.

With frustration mounting over lawmakers' inaction on gun control, the American Medical Association on Tuesday pressed for a ban on assault weapons and...

One man in upstate New York sawed his AR-15 rifle into pieces and posted a video of it on Facebook. A woman in Connecticut did the same with her handgun...

The teenager accused of using a semi-automatic rifle to kill 17 people at a Florida high school confessed to carrying out one of the nation's deadliest...