Everything you need to know about AR-15 rifles—from what "AR" means, to why the weapon is so commonly used by mass shooters.

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.

The AR-15 rifle, billed as “America’s rifle” by the National Rifle Association, has been commonly used by mass shooters and is one of the most ubiquitous weapons in the United States.

The capabilities of the AR-15 style, compared with other available rifles, can be exaggerated, as lawyers David Kopel and Gregory Wallace wrote last year.

The AR-15 is the most popular rifle in America, and rightfully so. There’s a lot to like about the design, but don’t overlook other options just because they aren’t an AR-15.

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

A gun manufacturer has launched a new marketing campaign for an AR-15 designed for children weeks after a six-year-old shot a teacher at a Virginia elementary school.

That includes the AR-15 style, sometimes called America’s most popular rifle. The Fourth Circuit Appeals Court upheld the law this summer in a 10-5 en banc ruling.

AR-15-style rifles were used by gunmen in New York; Uvalde, Texas; and now Colorado Springs, Colorado, in 2022.

What they don't tell you is that all centerfire rifle bullets travel at much higher speeds than handgun bullets and that AR bullets impact with much less force than most other centerfire rifles.

The AR-15 rifle has been in the news lately, including the deadly shooting at the Allen, Texas, outlet mall Saturday where at least eight were killed.