The calculation that a .223 round fired from an AR-15 can reach speeds of up to six football fields in a second was made using a 55 grain .223 Remington full metal case round fired at a horizontal ...

What is an AR-15 rifle, and why is it so popular. A similar firearm was used by the Jacksonville, Florida shooter at a Dollar General, officials said.

T he Allen mall shooting on May 6 was the 199th mass shooting of 2023, marking the most recent incident in which a gunman chose to use an AR-15 style rifle during the tragic event. Referred to as ...

Some of the worst massacres in recent memory have had something in common: the AR-15 style rifle. Scott Pelley reports on why the high-velocity rounds used in the gun make it so deadly.

The AR-15, first adopted by the U.S. Air Force and later by the rest of the armed forces, is a gas operated, direct impingement firearm that siphons off gunpowder gasses to cycle the weapon.

The black nitride finished 16" 5.56 NATO chamber barrel features an M4 feed ramp, A2 flash hider, a mid-length gas system and an A2 front sight gas block with a bayonet lug and sling mount.

The AR-15 design retained the 20" barrel of its AR-10 parent. The U.S. Army would start testing the AR-15 by late 1958, but it was the Air Force that was the early adopter, purchasing 8,500 AR-15s ...

The AR-15, developed with the Army in 1956 by the company Armalite, stands for "Armalite rifle," not "automatic rifle," as many think. That would be a misnomer, anyway, because the weapon doesn't ...

The semi-automatic rifle has been in wide circulation for more than a half-century. In recent years, gunmen have used AR-15-style weapons to carry out many of the country's worst mass shootings.

The AR-15 has attracted attention for its use in recent mass shootings. But the semi-automatic rifle is used by many American hunters.

The AR-15, the military-style rifle that a gunman used to kill 17 people at a South Florida high school Wednesday, is at once a ferociously powerful weapon, a symbol of freedom and individualism ...