Transcript for 'Bump stock' regulations discussed after Vegas shooting
calls are growing to restrict the devices called bump stocks used on a dozen of Stephen paddock's guns turing them into automatic weapons. Right now they are perfectly legal to buy. Our senior justice department correspondent Pierre Thomas has more. Amy, good morning. The carnage in Las Vegas has left many in the country soul searching and something we haven't seen in the wake of recent mass shootings, bipartisan dialogue about gun control and the NRA actively engaged. After the tragedy in Las Vegas, Republicans who often reject discussions of gun control at least willing to talk. Fully automatic weapons have been outlawed for many, many years so obviously we need to look at how we can tighten up the compliance with this law. Reporter: Now this from the NRA. We ought to take a look at that. See if it's in compliance with federal law and it's worthy of additional regulation. That being said, we didn't say ban, we didn't say confiscate. Reporter: An issue the gun accessory called a bump stock which allows a semiautomatic rifle to fire at about the same pace as a machine gun. Half of Las Vegas shooter Stephen paddock's 23 gun arsenal stashed in his hotel room were rigged with bump stocks, effectively allowing him to fire 400 to 800 rounds per minute, Thursday night president trump asked if the accessory should be banned. We'll be looking into that over the next short period of time. Reporter: Some have pulled bump stocks from their online inventory including Walmart and Cabell la's an outdoor retailer. Talk of additional retailers have them flying off the shelves. A lot are buying them because they'll be outlawed. Rorter: The price of an ar-15 bump stock jumped from $124 on this site to more than $2,000 and counting on this online auction. Exactly how many have been sold, we don't know. These devices are not really regulated, so no one can tell you. That's incredible. All right.
This transcript has been automatically generated and may not be 100% accurate.