The 300 Blackout and 5.56x45mm NATO are two of the most popular cartridges commonly chambered in AR-15 rifles, which means if you are looking to buy a new AR, then you may also be considering 300 ...

The JR-15 is a .22 long rifle roughly 20% smaller than a standard AR-15 that weighs less than 2-and-½ pounds. It is geared toward "smaller enthusiasts," according to Wee 1 Tactical, the ...

A YouTuber this week posted a video of the inner mechanics behind the oft-polarizing AR-15 rifle. The video, in explaining exactly how the rifle works, shows why the weapon is an efficient, and ...

By 1963, John F. Kennedy inspected an AR-15 in the Oval Office as Pentagon leaders sought an answer to the Soviet-made AK-47, the signature rifle of communist guerrilla insurgencies.

The AR-15's shell is designed to blast out its relatively small, heavy slug at an extremely high velocity, making it too dangerous for civilian use.

A Long Island high school is under lockdown after an apparent threat from a 15-year-old student who claimed to be armed with an AR-15 semiautomatic rifle, law enforcement sources said.

The Supreme Court declined to take up a case that involves whether possessing AR-15s is protected by the Second Amendment, but the court’s conservatives are signaling they soon will.

A federal court judge on Tuesday ruled New Jersey’s ban on AR-15 rifles is unconstitutional, a decision that could force the state to lift its decades-old prohibition on certain semi-automatic ...