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Family of AR-15 Inventor Eugene Stoner: He Didn’t Intend It for Civilians

Family of AR-15 creator speaks out 1:56

The AR-15 is the most talked about gun in America.

But the AR-15’s creator died before the weapon became a popular hit and his family has never spoken out.

Until now.

"Our father, Eugene Stoner, designed the AR-15 and subsequent M-16 as a military weapon to give our soldiers an advantage over the AK-47,” the Stoner family told NBC News late Wednesday. "He died long before any mass shootings occurred. But, we do think he would have been horrified and sickened as anyone, if not more by these events."

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The inventor’s surviving children and adult grandchildren spoke exclusively to NBC News by phone and email, commenting for the first time on their family’s uneasy legacy. They requested individual anonymity in order to speak freely about such a sensitive topic. They also stopped short of policy prescriptions or legal opinions.

Related: AR-15 Style Rifle Used in Orlando Massacre Has Bloody Pedigree

But their comments add unprecedented context to their father’s creation, shedding new light on his intentions and adding firepower to the effort to ban weapons like the AR-15. The comments could also bolster a groundbreaking new lawsuit, which argues that the weapon is a tool of war — never intended for civilians.

Eugene Stoner would have agreed, his family said.

The ex-Marine and "avid sportsman, hunter and skeet shooter" never used his invention for sport. He also never kept it around the house for personal defense. In fact, he never even owned one.

FILE: Colonel Robert Sigholtz from Springfield, Virginia holds a new rifle in March 1967 — the AR-15 Horst Faas / AP file

And though he made millions from the design, his family said it was all from military sales.

"After many conversations with him, we feel his intent was that he designed it as a military rifle," his family said, explaining that Stoner was "focused on making the most efficient and superior rifle possible for the military."

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He designed the original AR-15 in the late 1950s, working on it in his own garage and later as the chief designer for ArmaLite, a then small company in southern California. He made it light and powerful and he fashioned a new bullet for it — a .223 caliber round capable of piercing a metal helmet at 500 yards.

The Army loved it and renamed it the M16.

A look at the AR-15 assault rifle's place in America after attack in Orlando 3:10

But after Stoner’s death in 1997, at the age of 74, a semi-automatic version of the AR-15 became a civilian bestseller, too, spawning dozens of copy-cat weapons. The National Rifle Association has taken to calling it “America’s rifle.”

The bullets that tore through the Pulse nightclub in Orlando were Stoner’s .223 rounds, fired from a AR-15 spin off made by Sig Sauer.

Image: A SIG MPX hangs from the ceiling at the SIG Sauer GmbH on the exhibit floor
A SIG MPX hangs from the ceiling at the SIG Sauer GmbH on the exhibit floor during the National Rifle Association (NRA) annual meeting in Louisville, Kentucky, U.S., on May 20, 2016. Luke Sharrett / Bloomberg via Getty Images, file

In all, an AR-15 style rifle has been used in at least 10 recent mass shootings — including at an elementary school in Newtown, Connecticut, a movie theater in Aurora, Colorado, and a work party in San Bernardino, California.

"What has happened, good or bad, since his patents have expired is a result of our free market system," Stoner’s family said. “Currently, a more interesting question is ‘Who now is benefiting from the manufacturing and sales of AR-15s, and for what uses?'"

That’s the question for the rest of us.