Once an obscure device, 'bump stocks' are in the spotlight

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(AP Photo/Allen Breed, File). FILE - In this Feb. 1, 2013, file photo, an employee of North Raleigh Guns demonstrates how a "bump" stock works at the Raleigh, N.C., shop. The gunman who unleashed hundreds of rounds of gunfire on a crowd of concertgoers... (AP Photo/Allen Breed, File). FILE - In this Feb. 1, 2013, file photo, an employee of North Raleigh Guns demonstrates how a "bump" stock works at the Raleigh, N.C., shop. The gunman who unleashed hundreds of rounds of gunfire on a crowd of concertgoers...
(AP Photo/Allen Breed, File). FILE - This Feb. 1, 2013, file photo shows a "bump" stock next to a disassembled .22-caliber rifle at North Raleigh Guns in Raleigh, N.C. The gunman who unleashed hundreds of rounds of gunfire on a crowd of concertgoers in... (AP Photo/Allen Breed, File). FILE - This Feb. 1, 2013, file photo shows a "bump" stock next to a disassembled .22-caliber rifle at North Raleigh Guns in Raleigh, N.C. The gunman who unleashed hundreds of rounds of gunfire on a crowd of concertgoers in...
(AP Photo/Allen Breed, File). FILE - In this Feb. 1, 2013, file photo, an employee of North Raleigh Guns demonstrates how a "bump" stock works at the Raleigh, N.C., shop. The gunman who unleashed hundreds of rounds of gunfire on a crowd of concertgoers... (AP Photo/Allen Breed, File). FILE - In this Feb. 1, 2013, file photo, an employee of North Raleigh Guns demonstrates how a "bump" stock works at the Raleigh, N.C., shop. The gunman who unleashed hundreds of rounds of gunfire on a crowd of concertgoers...
(AP Photo/John Locher). Drapes billow out of broken windows at the Mandalay Bay resort and casino Monday, Oct. 2, 2017, on the Las Vegas Strip following a mass shooting at a music festival in Las Vegas. Authorities say Stephen Craig Paddock broke the w... (AP Photo/John Locher). Drapes billow out of broken windows at the Mandalay Bay resort and casino Monday, Oct. 2, 2017, on the Las Vegas Strip following a mass shooting at a music festival in Las Vegas. Authorities say Stephen Craig Paddock broke the w...
(AP Photo/Chris Carlson). Police tape blocks off the home of Stephen Craig Paddock on Monday, Oct. 2, 2017, in Mesquite, Nev. Paddock killed dozens and injured hundreds on Sunday night when he opened fire at an outdoor country music festival in Las Veg... (AP Photo/Chris Carlson). Police tape blocks off the home of Stephen Craig Paddock on Monday, Oct. 2, 2017, in Mesquite, Nev. Paddock killed dozens and injured hundreds on Sunday night when he opened fire at an outdoor country music festival in Las Veg...
By LISA MARIE PANE
Associated Press

ATLANTA (AP) - The Las Vegas gunman possessed a little-known device called a "bump stock" that was not widely sold - until now.

Originally created with the idea of making it easier for people with disabilities to shoot a gun, the attachments allow a semi-automatic rifle to mimic a fully automatic weapon by unleashing an entire large magazine in seconds. Now the deadliest mass shooting in modern U.S. history has drawn attention to the devices, which critics say flout federal restrictions on automatic guns.

The stocks have been around for less than a decade. The government gave its seal of approval to selling them in 2010 after concluding that they did not violate federal law.

The device basically replaces the gun's shoulder rest with a "support step" that covers the trigger opening. By holding the pistol grip with one hand and pushing forward on the barrel with the other, the shooter's finger comes in contact with the trigger. The recoil then causes the gun to buck back and forth, repeatedly "bumping" the trigger against the finger.

Technically, that means the finger is pulling the trigger for each round fired, keeping the weapon a legal semi-automatic. The rapid fire does not necessarily make the weapon any more lethal - much of that would be dependent on the type of ammunition used. But it does allow the person firing the weapon to get off more shots more quickly.

It's unclear how many have been sold. The industry leader, Slide Fire, did not return messages seeking comment. But the Abilene, Texas, company's Facebook page is filled with videos extolling its features, including one in which a woman gushed, "It's so easy because once you slid it forward and leaned into it, it just fires." In another video, a man fires off 58 rounds to celebrate his 58th birthday in just 12 seconds.

Sales for firearms or specific accessories seem to jump after every high-profile shooting. That will likely happen again with bump stocks, said Dr. Garen Wintemute, director of the Violence Prevention Research Program at the University of California, Davis.

"People will go, 'Oh geez, I should get one of those.' The other is that people will be concerned about efforts to ban them," Wintemute said.

Manufacturers tout the stocks, some of which sell for less than $200, as offering a simple and affordable alternative to automatic weapons without the hassle of a rigorous background check and other restrictions.

Ed Turner, a former police officer who owns a gun shop in Stockbridge, Georgia, said he's already seeing a run on bump stocks since the shooting. He said he would be surprised if he had sold two of them in the past decade, but now he's unable to find any available, even from wholesalers.

Jay Wallace, owner of Adventure Outdoors in Smyrna, Georgia, said soon after most of his customers buy one, "the newness wears off and they put it away and it stays in a closet."

While the stocks allow a gun to quickly spray bullets, gun experts say they also create such a jolt that accuracy is affected. That may not matter to gun owners who just want the thrill of shooting with one, or for those bent on destruction. Stephen Paddock, the 64-year-old gunman, fired hundreds of rounds indiscriminately from his 32nd-floor room at the Mandalay Bay Hotel and Casino on a music festival outside.

He had 23 guns in the room. Authorities found bump stocks attached to 12 of the weapons, Bureau of Alcohol, Tobacco and Firearms Special Agent in Charge Jill Schneider said.

At Paddock's home, authorities found 19 more guns, explosives and thousands of rounds of ammunition. Several pounds of ammonium nitrate, a fertilizer that can be turned into explosives, were in his car, authorities said.

The shooting renewed a push by some lawmakers to ban bump stocks. California Sen. Diane Feinstein, a Democrat, said the devices can enable a gun to fire 400 to 800 rounds per minute and "inflict absolute carnage."

The purchase of fully automatic weapons has been significantly restricted in the U.S. since the 1930s. The National Firearms Act was amended in 1986 to prohibit the transfer or possession of machine guns by civilians, with an exception for those previously manufactured and registered.

Numerous attempts to design retrofits failed until bump stocks came on the market.

Erich Pratt, executive director of Gun Owners of America, said the industry is prepared to have the devices scrutinized by lawmakers and gun-control advocates. That happens regularly after a major shooting. But he and others defended their use, suggesting it's unfair to go after firearms when other weapons - trucks and fertilizer, for example - aren't as quickly criticized after deadly attacks.

"Ultimately, when Congress ... looks at this, they'll start asking questions about why anybody needs this, and I think the answer is we have a Bill of Rights and not a Bill of Needs," Pratt said.

Kevin Michalowski, executive editor of Concealed Carry Magazine, agreed.

"If he used fully automatic weapons, he likely got them illegally. If he used aftermarket parts, he used them for illegal activities," Michalowski said. "For whatever reason, this man wanted to kill lots of people. ... Adding extra restrictions to guns, magazines or accessories will not prevent others from committing mass murder."

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Associated Press writers Sadie Gurman in Washington and Michael Balsamo in Las Vegas contributed to this report.

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For complete all-formats coverage of the Las Vegas shooting, click here: https://apnews.com/tag/LasVegasmassshooting .

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This story has been corrected to indicate that the name of the industry leading manufacturer of bump stocks is Slide Fire, not Slide Force.

Copyright 2017 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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