Why the AR-15 Was Never Meant to be in Civilians' Hands

Jonathan Ernst / Reuters
Editor’s Note: This article previously appeared in a different format as part of The Atlantic’s Notes section, retired in 2021.

Decades ago I wrote in the Atlantic about the creation of the AR-15, which was the predecessor of the military’s M-16 combat rifle and which now is the weapon most often used in U.S. mass gun murders. After the latest large-scale gun massacre, the one in Texas, I did a follow-up post about the AR-15, and then a range of reader views.

Among the responses I got was from a man who as a young engineer in the Vietnam era had worked, at Colt Firearms, on the M-16. He writes to explain why he is shocked, as he says the AR-15’s famed designer Eugene Stoner would have been, to see this weapon anyplace other than the battlefield.

“I do not believe that there is any place in the civilian world for a family of weapons that were born as an assault rifle,” he writes at the end of his message. You’ll see the reasoning that takes him there. He begins:

During the Vietnam war era, as a newly graduated mechanical engineer, I was hired by Colt's Firearms, the original manufacturer of the M-16, and tasked with M-16 related assignments during my employment.

There was no commercially available civilian version of the AR-15 prior to the U.S. Military's decision to make it the default military rifle replacing the M-14, and designating it as the M16A1. I have significant personal experience with the issues experienced by the M16A1, which were the result of a combined civilian/military screw-up. [JF note: this screwup was the subject of my original article.]

The AR-15 was developed specifically as a military weapon to replace the M-14. It was probably one of the first major weapons systems to be privately developed following the DOD's decision to privatize the design and development function. This function had heretofore been carried out by publicly funded government operations, most notably, in the case of military small arms, the Springield Arsenal.

The AR-15 derived from a design by Eugene Stoner. His original design using that architecture and operating system was the AR-10, which used the 7.62mm NATO round. Seen today, it looks like an overgrown AR-15. The Armalite Company tasked two engineers with developing a version of the AR-10 that used the 5.56mm cartridge; these engineers were Jim Sullivan and Bob Fremont.

Only after civilian manufacturers like Colt's made boatloads of money producing M16A1's and selling them to the government did someone (I believe it was Colt's Firearms) decide to make and sell a semi-automatic-only version of the weapon for civilian sale. It was, of course, known as the AR-15.

Small but significant changes were made to the architecture of the lower receiver, primarily slight relocation of pivot pins and redesign of the trigger/hammer components that pivoted on them, so that it would not be possible to acquire, legally or illegally, M16 trigger/hammer and fire selector components and thus easily convert the AR-15 to possess the same full automatic capability as the M16.

***

Like Eugene Stoner, whose mission was producing better equipment for the military, I do not believe that there is any place in the civilian world for a family of weapons that were born as an assault rifle. I am a staunch supporter of properly equipping our nation's military but also of effective gun control for weapons available to civilians, to include banning those which are inappropriate outside a military context.

James Fallows is a contributing writer at The Atlantic and author of the newsletter Breaking the News.