The AR-15 Rifle: The Gun Congress Can't Ban

The AR-15—the type of semi-automatic gun used in the shootings in Aurora and Sandy Hook—is the most popular rifle in America. Harper’s contributor Dan Baum talks about why the AR-15’s “modularity” makes the gun incredibly difficult to regulate. His article "How to Build Your Own AR-15: The Gun Congress Can’t Ban" is in the June issue of Harper’s. Baum is also the author of the book Gun Guys: A Road Trip.