The AR-15 has taken center stage in the American gun debate. But at its heart, the AR-15 is a rifle that has been modified to look and feel a certain way.
The emphasis on its appearance, however, has shaped how the country regulates firearms, to the frustration of many gun owners and gun control advocates alike.
The AR-15 is a semiautomatic rifle that usually shoots 5.56mm rounds. It has a detachable magazine so users can put in 5-, 10-, 30-, or even 60- and 100-round magazines.