Attorney General Jeff Sessions said Tuesday that he believes bump fire stocks can be effectively banned through regulation, teasing that an announcement from the Justice Department would be coming soon. “We’ve had to deal with previous (Bureau of Alcohol, Tobacco, Firearms and Explosives) legal opinions but our top people in the Department of Justice have believed for some time that we can, through the regulatory process, not allow the bump stock to convert a weapon from semi automatic to fully automatic,” Sessions said at a gathering of state attorneys general in Washington. “We’ve been working on that for some time. We’ll have an announcement on that soon. We believe in that,” he said. Bump fire stocks, commonly known as bump stocks, are devices that allow semi-automatic weapons to fire at a more rapid rate. Investigators have said 12 bump stock devices were found in the hotel room where a shooter in Las Vegas fired on a crowd of concertgoers last year, killing 58 people. The Justice Department in December announced that it was beginning the rule-making process that could allow it to reinterpret the legality of bump stocks. President Donald Trump sent a memo to Sessions ordering the department propose regulations banning the devices last week after the Parkland school shooting. Some lawmakers and law enforcement experts have been skeptical that bump stocks could be banned through regulation without miring the ATF in lawsuits, pushing instead for a legislative fix. The National Rifle Association has supported the ATF review of the bump stock and said devices like it should be subject to additional regulations, but has publicly come out against legislation that would ban the device. Congressional efforts to ban the devices in the wake of last fall’s Las Vegas shooting haven’t progressed.