James Fallows on AR-15 style rifle

“A little bullet pays off so much in wound ballistics. That is what people who choose these weapons know.”

“Americans who know nothing else about firearms are all too familiar with the name AR-15. It’s the semi-automatic weapon that murderers have used in many of the most notorious and highest-casualty gun killings of recent years: Aurora, Colorado. Newtown, Connecticut. Orlando, Florida. San Bernardino, California. Now, with modified versions, in Las Vegas, Nevada, and Sutherland Springs, Texas.”

“The farsighted Willard G. Wyman, the commanding general of the Continental Army Command, had asked Stoner to design a rifle precisely to take advantage of the “payoff” of smaller bullets. The AR-15, the precursor of the M-16, used .22-caliber bullets instead of the .30-caliber that had long been standard for the Army. As early as 1928, an Army “Caliber Board” had conducted firing experiments in Aberdeen, Maryland, and had then recommended a move toward smaller ammunition...”