On Saturday the Trump administration took the first steps to ban "bump stocks" by formally submitting legislation to ban the modification, which gives high-capacity rifles the ability to shoot as machine guns.
This submission is a formal requirement of the regulatory review process.
Authorities say a bump stock was used in the mass shooting in Las Vegas previous year that killed 58 people and injured hundreds.
On Saturday, the justice department submitted a proposed regulation that would prohibit the sale of the devices.
The proposal still needs to be approved by the White House Office of Management and Budget, according to the Associated Press.
But the step is tangible evidence that the department is working toward regulating the devices, however gradual that work might be.
He would have to complete a similar public comment process if the Office of Management and Budget approves the proposed regulation. Today, the Department of Justice announced it has proposed regulation of firearms to include a ban on "bump stocks". Bump stocks are gunstocks created to make bump firing easier-that is, they allow the gunman to use the gun's recoil to press the trigger faster than a human finger can, simulating the rapid-succession fire of an automatic weapon. Current iterations of the bump stock technically produce multiple trigger pulls, using a gun's recoil against a shooter's trigger finger to speed up the fire rate.
A push by lawmakers to ban bump stocks failed in the aftermath of the Las Vegas incident, but the Florida school shooting turned up the pressure on the Trump administration to address the matter through regulation.
After February's shooting, Trump said he supported a ban on bump stocks, as well as potentially arming teachers - a proposal that has been criticised by many students and teachers. Those who want to see the devices regulated say legislation would be a far easier and more effective way to ban them, as a change in regulation is surely to be met with legal challenges from manufacturers.
During a Cabinet meeting Thursday, Trump vowed that a ban on bump stocks as a legal item in the USA was nearly "finished".
Americans have been wondering what, if any, concrete gun control reforms would be made in response to the horrific massacre that left 17 innocent individuals dead last month in Parkland, Florida.