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    Healing garden springs up after Las Vegas shooting

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    Las Vegas shooting: Former colleague gives blood in honor of friend killed at concert

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    Victim recalls Las Vegas shooting

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    Pray vigil at Las Vegas City Hall

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    Man heard shots, helped concert goers

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    Joe Thomas and Elizabeth Reitz describe hearing of the Las Vegas shooting

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    Las Vegas shooting: Dixie GunWorx

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    Sunrise Medical Center treats 180 Las Vegas shooting victims

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    Witness to Las Vegas shooting

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    How the Las Vegas shooting unfolded

From Backpage.com to Mo Money Pawn, Arizonans have been searching websites and stores to learn how to obtain a “bump stock,” the rifle attachment used by gunman Stephen Paddock in the Last Vegas shooting.

Since Tuesday, when Clark County Sheriff Joe Lombardo announced that Paddock had used a bump stock in the deadliest mass shooting in modern U.S. history, interest has escalated.

MORE: Las Vegas shooter bought 33 guns in last 12 months

Henry Escobar, gun manager at Mo Money Pawn, said the only device available at the central Phoenix store is attached to an AR-15. The last time a stop was sold by itself was more than a month ago.

When the shop had multiple in stock, the device wasn’t in demand, he said.

“They weren’t as popular; they sat there for the longest time, and we actually marked them down just to get them moving,” Escobar said.

No regulation now, but that may change

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He said that anyone could buy a bump stock; they are not regulated. Most people use the device for recreational purposes.

“I think (people) just want to buy them now because if they make them illegal, they’ll be worth double, triple than they are being sold now,” Escobar said.

The White House and the National Rifle Association signaled Thursday that they are open to the idea of regulating the devices, which Paddock used to rapidly fire bullets on a crowd of concertgoers Sunday night.

MORE: Las Vegas shooting: Gabby Giffords, Mark Kelly push more gun control

Some lawmakers have proposed congressional legislation for bump stocks, while the NRA and others said the Bureau of Alcohol, Tobacco, and Firearms should issue new regulations.

Bump stock prices spike in Arizona

On Backpage.com, bump stocks are being advertised from $150 to $800.

Escobar said generally the stocks they sell go for a little over $100.

David Beatty said he posted an ad on Backpage, offering one of his ten bump stocks for $500, as an experiment.

“I just wanted to see what the frenzy was doing and what the market was there,” Beatty said. “If I don’t sell any, I don’t care.”

He said he has received multiple responses and only one person has said the cost is stopping them from buying it. The only other reason was that ammo would be more expensive because the bump stock would burn through it faster.

Originally he had bought the stocks from the manufacturer Slide Fire. On Thursday, the website stated that the company had “decided to temporarily suspend taking new orders in order to provide the best service with those already placed.”

Those who want to order will have to wait until Slide Fire announces that it is again taking orders, according to the statement.

‘Most people didn’t know they existed’

Beatty said he has been in the gun manufacturing business for about 30 years. He still builds rifles and said he is licensed to make parts for hundreds of companies.

“When (bump stocks) came out, there was a huge demand, then it dropped off,” he said. “Then they came out with some other model, then it kicked up some, then it dropped off.

 “Most people didn’t know they existed, but now (the shooting) really brought it to their attention.”

MORE: Phoenix man turns guns over to police in response to Las Vegas shooting

The bump stock can be attached to a semi-automatic rifle and replaces the regular stock. It slides easily back and forth while the gun is being fired, using the kickback — the “bump” — the shooter feels while firing.

Beatty said he has known people who can take the attachment out of the box and know exactly how to use it, while others have to practice multiple times.

“It’s pretty easy to learn; it just helps if you know the theory behind it,” Beatty said.

Includes information from USA Today.

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