LAS VEGAS, Nev. (WLFI) — It's been more than a month since the Las Vegas shooting and we investigate the gun modifications that were used. Like the "bump stock."

A "bump stock" is the device the shooter Stephen Paddock used to make his semi-automatic weapon operate like a fully-automatic one.

Paddock used 12 bump stocks when he shot at a crowd of concert-goers.

More than 58 people were killed, making it the largest mass shooting in modern U.S. history.

Bump stock vendors suspended the device after the shooting, but now they're back on the shelves and some have even made their way to Lafayette.

We spoke to a local gun store owner about the devices and a local group fighting for more restrictions.

"When it first happened, people who were coming through our doors said they had tried everywhere. We were just one of the places on the list that they were trying to find a bump stock," said Joy Rhode, co-owner of Emergency Response Gear & Embroidery. "It looks like those might be banned eventually. The NRA doesn't seem to really support them."

Watch News 18 at Six tonight to hear from someone who says bump stocks are nothing more than range toys.

You'll also hear from Lafayette's chief of police and why he thinks owning a bump stock is a risk.