The National Rifle Association has called for “additional regulations” on bump-stocks, a rapid fire device used by the Las Vegas massacre gunman.
The group said: “Devices designed to allow semi-automatic rifles to function like fully-automatic rifles should be subject to additional regulations.”
Republicans have said they would consider banning the tool, despite years of resisting any gun control.
Lawmakers plan to hold hearings and consider a bill to outlaw the device.
The NRA called on Thursday for regulators to “immediately review whether these devices comply with federal law”.
“In the aftermath of the evil and senseless attack in Las Vegas, the American people are looking for answers as to how future tragedies can be prevented,” NRA chiefs Wayne LaPierre and Chris Cox wrote in the statement.
They criticised politicians who are calling for gun control, writing that “banning guns from law-abiding Americans based on the criminal act of a madman will do nothing to prevent future attacks”.
The statement, the organisation’s first since Sunday’s attack in Las Vegas that left 58 people dead and nearly 500 injured, noted that bump-stocks were approved by the Obama administration’s Bureau of Alcohol Tobacco and Firearms.
The NRA’s plan becomes clear
Analysis by Anthony Zurcher, BBC Washington
The NRA’s strategy for responding to the Las Vegas mass-shooting is now coming into focus.
By recommending that an executive branch agency conduct a review of the legality of bump stock devices, the extremely influential gun rights lobby is seeking to direct efforts towards administrative, not legislative, solutions.
If Congress were to start drafting new laws, the process may be more difficult for the NRA to control. Democrats, who have been clamouring for the opportunity to debate new gun-control laws, could have their chance. Republican congressional leadership may try to clamp down on the proceedings, but there’s a chance other proposals -like limits on magazine capacity, military-style rifle features and new background check requirements – could come up for consideration.
These types of provisions are popular with the public at large but vigorously opposed by the NRA and their supporters in Congress. It could make for difficult votes for some conservative legislators.
The White House and many congressional Republicans are pledging to have a “conversation” about the issue and “look into” the details. That, for the moment, is a far cry from action.
The NRA is now suggesting an alternate route.
White House spokeswoman Sarah Sanders, who spoke to reporters moments after the NRA statement was issued, said: “We’re certainly open to that moving forward, but we want to be part of that conversation as it takes place in the coming days and weeks.”
In the same statement the NRA urged Congress to pass their longstanding pet proposal to expand gun rights nationwide, so-called right-to-carry reciprocity.
The lobby group wants gun-owners with concealed-carry permits from one state to be allowed to take their weapons into any other US state, even if it has stricter firearms limits.
Another NRA policy priority, the deregulation of silencer attachments, appears to have stalled in Congress in the wake of the Las Vegas attack, after Republican sponsors withdrew their bill.
A bill to ban bump-stocks was submitted to the US Senate on Wednesday by California Democrat Dianne Feinstein.
A Republican-led version of the bill may be submitted for debate as early as Thursday, Florida Republican Carlos Curbelo told reporters.
Bump-fire stocks, also called bump-stocks and slide-fire adapters, allow semi-automatic rifles to fire at a high rate, similar to a machine gun.
But they can be obtained without the extensive background checks required of automatic weapons.
Stephen Paddock, the gunman in Las Vegas, had fixed the accessories to 12 rifles used in his attack.