This Rock River Arms rifle is among the weapons similar in style to the Bushmaster… (Joe Raedle/Getty Images…)
Two deadly weeks. Three high-profile public shootings. Three assault rifles conceived for military use, and three men who weren't supposed to have them.
As an ex-con, William Spengler was barred from having guns. But when he opened fire on Webster, N.Y., firefighters on Christmas Eve, federal law enforcement sources have told the Los Angeles Times that he did so with guns from someone else who had also gotten them illegally.
In an interview Thursday on CNN, David Keene, president of the National Rifle Assn., said this is a particularly critical problem.
"Most guns that are used illegally in this country are either bought on the black market or are stolen," he said, responding to a question about a New York newspaper that published the names and addresses of legal gun owners.
As debate churns over the nation's gun policies, every passing shooting enters a new data point in the broader political tabulations about how to prevent public shootings that some experts say are happening no more often than usual.
Much of the debate has focused on AR-15-style assault rifles -- "modern sporting rifles," as some sellers market them -- that have swelled in popularity in recent years. Gun manufacturer Freedom Group Inc., which owns Bushmaster, has estimated sales for such guns grew at a 27% compound annual growth rate between 2007 and 2011.
AR-15s were originally designed to penetrate a steel helmet from 500 yards away. Drawn from the U.S. military's desire to compete with the battlefield rise of the AK-47 among Communist forces in the 1950s and '60s, the AR-15 found widespread use among American troops during the Vietnam war under a modified military version, the M-16.
Semiautomatic variants have since been replicated for the civilian market by companies like Bushmaster, ArmaLite Inc. and Colt, which owns the trademark on the term "AR-15," though the term is still commonly used to describe similarly configured rifles.
Today, most owners, citing the AR-15's range and accuracy, buy them for casual target shooting and home defense, according to a 2010 online survey by the National Shooting Sports Foundation. Of the more than 7,000 respondents, 99% were men and often had military or law enforcement backgrounds. Oak Creek, Wis., Sikh temple shooter Wade Page was brought down by a responding officer with an AR-15.
Americans can own these weapons legally, but the shooters in the three recent cases did not.
It was Christmas Eve, and firefighters were responding to a house fire in the otherwise sleepy lakeside community of Webster, N.Y., when muzzle flashes lit up the morning dark.
“We are being shot at, multiple firemen down, multiple firemen shot," one firefighter radioed in. "I am shot. I think it was an assault rifle. We have multiple firemen down.”
Spengler, 62, was doing the shooting. He left a typewritten note saying that killing was the thing he did best, but as a felon, he was barred from possessing guns; he'd killed his grandmother with a hammer in 1980 and served nearly 18 years in prison before his release.
After he'd ambushed four firefighters and then shot himself in the head, officials found him with a Bushmaster .223 rifle with a flash suppressor -- which helps shooters from getting blinded by their own fire -- and a Mossberg 12-gauge shotgun that had both been "illegally purchased" within the last several years by “someone else,” federal officials told the Los Angeles Times on Wednesday.
Spengler also had a .38-caliber Smith & Wesson revolver, these officials said, which he'd purchased before his conviction.
"He was equipped to go to war and kill innocent people," Webster Police Chief Gerald Pickering said.
Police suspect he used the Bushmaster to do his killing. One surviving firefighter's shoulder blade was broken in multiple places, with a bullet also puncturing his lung; the other survivor took a round that splintered inside his gut, with some fragments lodged near his spine. Officials said Wednesday they expected both men would be upgraded to "satisfactory" condition.
The same style of assault rifle was used in a very different attack two weeks earlier and more than 2,000 miles away.
Jacob Tyler Roberts, 22, who had been known as a nice guy with a sense of humor, clutched an AR-15-style rifle as he jogged through a Macy's store at a mall in Clackamas, Ore., that was jammed with holiday shoppers. The gun -- a Stag Arms AR-15 variant, according to the Oregonian -- wasn't his. He'd stolen it from a friend who owned it legally.
"I am the shooter!" he shouted right before opening fire near the food court, one witness said. He killed a 54-year-old hospice nurse and a 45-year-old kiosk retailer.