The gun debate has emerged as a hot topic since the deadly Las Vegas shooting. According to law enforcement officials, rifles used by Stephen Paddock were outfitted with what's called a "bump stock."

"The bump stock is questionable with the ATF,” said Scott Brown, an employee at JJ’s Pawn Shop. That is why no one sells them."

The device replaces a rifle's standard stock which will free the weapon to slide back and forth allowing it to fire rapidly.

Brown says “bump stocks” aren’t banned under federal law because they mimic the rate of fire of a machine gun, without converting it into a fully automatic firearm.

Law enforcement officials say Paddock used the device when he fired upon thousands of people at a country music festival in Las Vegas, killing 59 people and injuring more than 500.

Automatic firearms are illegal to purchase unless you have a class three dealer license, which requires a lengthy background check that could take up to eight months to a year.