What to know about AR-15-style rifles, some of the most commonly used weapons in U.S. mass shootings.

The training covers patient care and resuscitation in emergency scenarios. Fortis Hospital in Kalyan has unveiled a clinician ...

A 14-year-old boy used an AR-platform-style rifle in a high school near Atlanta, Georgia and killed two students and two teachers.

As Republican representatives bid to get the AR-15 designated as America's "national gun," Newsweek explores how the firearm has become a conservative emblem.

Former President Donald Trump was shot Saturday with what has become the weapon of choice for mass shooters, an AR-15-style firearm.

The Washington Post examined autopsy and postmortem reports from nearly a hundred victims of past mass shootings that involved an AR-15 style rifle.

The saga of the AR-15 is a story of how quickly an invention can leave the control of the inventor, how it can be used in ways the creator never imagined.

Here’s what the “AR” stands for in AR-15, the military-style weapon popular with gun enthusiasts and Second Amendment advocates.

The AR-15 semi-automatic rifle is one of the most popular guns in the U.S., and one of the most reviled. It is an emblem of America’s political divisions, beloved by firearm enthusiasts for its ...

An AR-15-style semiautomatic rifle was recovered by law enforcement at the scene of the attempted assassination of former President Donald J. Trump at his rally in Butler, Pa., on Saturday.

The National Rifle Association has called the AR-15 the "most popular rifle in America" and estimates Americans own more than 8 million of them.