Editor's note: In the hours after the mass shooting at an Orlando night club, law enforcement said the gunman's weapons included an "AR-15-type assault rifle." Law enforcement later said the shooter had used a different high-capacity, semi-automatic rifle, the Sig Sauer MCX rifle. This story was reported and written before the identity of the weapon was changed.
The AR-15 used to kill 49 people at an Orlando nightclub is among the most-preferred rifles in the United States.
As the worst mass shooting in U.S. history renews calls for outlawing the gun, recreational enthusiasts in Minnesota are pushing back against critics who call it an assault weapon.
"Assault is an action," said Garrett Streitz, a salesman at Alexandria, Minn.-based Alex Pro Firearms who takes umbrage at the phrase. "We're just people who like to hunt and like to shoot and there's people that give so many good [gun owners] a bad name."
While far more homicides are committed with handguns than with rifles, AR-15s have been the weapon of choice in some of the worst mass shootings in recent years. Omar Mateen used one to attack patrons of the gay club Pulse early Sunday, as did the perpetrators of attacks in San Bernardino, Calif., which left 14 dead, and at Sandy Hook Elementary School in Newtown, Conn., which left 28 dead, including 20 children.
A witness at a weekend party south of the Twin Cities where four people were shot said someone fired an AR-15 into the air in an effort to break up the party.
The federal government does not track exactly how many AR-15s are in circulation, but experts put that number at 10 million to 12 million across the country, according to the New York Times.
Democratic presidential front-runner Hillary Clinton on Monday called AR-15s "weapons of war" and vowed to outlaw them if she wins office.