Bump stocks allow semi-automatic weapons to fire like automatic weapons and Las Vegas shooter Stephen Paddock had affixed them to some of his weapons as he rained gunfire on an outdoor concert from his hotel suite.
Investigators have revealed that accused gunman Nikolas Cruz had a history of behavioral problems, but was still able to get his hands on at least 10 guns, including the AR-15 rifle he allegedly used to murder 17 classmates and teachers at his former high school in Parkland, Florida.
While there have been no reports that the shooter in the Parkland, Fla., school shooting last week that killed 17 people used such a device, a shooter last October in Las Vegas who massacred 59 people and wounded hundreds others did use bump stocks.
President Donald Trump said Tuesday that he had directed the Justice Department to propose a ban on devices that modify guns, such as so-called bump stocks, which increase the rate of fire of semiautomatic firearms.
Trump said he expected regulations to ban the devices will be finished "very soon".
Here is text of the memorandum, in full.
"We must do more to protect our children, we have to do more to protect our children", Trump added, before announcing that in scheduled meetings with lawmakers, students and community leaders he would be discussing how best to protect communities in the US.
The FBI revealed Friday that it did not follow proper protocol after admitting they received a tip last month that Cruz had a gun, wanted to "kill people" and had the "potential of him conducting a school shooting".
Bump stocks are now legal gun accessories that allow semi-automatic firearms to fire in a near-automatic fashion.
Trump spokeswoman Sarah Huckabee Sanders qualified the support, stressing that talks continue and "revisions are being considered", but said "the president is supportive of efforts to improve the federal background check system".
Meanwhile, President Trump is considering whether to strengthen the federal background check system for gun sales. Bipartisan action has been elusive in the wake of previous mass shootings, including some of the deadliest rampages in modern us history.
"We can do more to protect our children".
"You guys need to make sure that you stay strong and you keep the message!" a Florida high school student told a crowd as he stood atop a black van.
Meanwhile, the state House has voted down a motion to take up a bill that would ban assault rifles, effectively killing the measure for this session.