The powerful pro-gun lobby group broke from its traditional outright opposition to any gun control efforts and NRA leaders Wayne LaPierre and Chris Cox called on USA authorities to review the laws surrounding so-called "bump stocks".
Nine Republican senators, including Sen. But they were far from a guarantee of a path forward for the new legislation by California Sen.
Republican House Speaker Paul Ryan told a USA radio programme he was open to regulating the devices.
"I think this is about chipping away at the Second Amendment", he said, referring to the clause in the US Constitution which guarantees citizens the right to bear arms.
A bump stock is a piece of plastic or metal molded to the lower end of a rifle. The Senate's Judiciary Chairman Chuck Grassley has said he'd need a full investigation into what happened in Las Vegas before holding any hearing.
Bump stocks reportedly have stopped being offered by retailers like Cabela's as well, at least for now.
A bump stock is a firearm accessory used to accelerate gunfire, essentially turning a semi-automatic weapon into an automatic.
Bump stocks are legal and originally were meant to help people with limited hand mobility fire a semi-automatic without the individual trigger pulls required.
The NRA "can throw a sacrificial lamb of "bump stocks" because they know that gun owners don't use them or like them", he added. It pours millions of dollars into political campaigns and successfully blocks legislation that would either ban certain firearms or make them more hard to purchase.
"Look, I didn't even know what they were until this week, and I'm an avid sportsman", the Wisconsin Republican said in a clip of the interview that aired Thursday.
"People are just coming up to speed with just what these things are".
Following the 2007 Virginia Tech shooting in which a mentally ill student shot and killed 32 people and wounded 17, the NRA worked with gun-control advocates to fund a bill created to improve record keeping so that people with mental illnesses were unable to purchase a firearm.
Thus, bump stocks serve no legitimate sporting or self-defense purposes. Fully automatic rifles manufactured before 1986 are still legal but must be registered with the government and are tightly controlled. Popular gun enthusiast Jerry Miculek posted this video of himself testing a hand-cranked device like a little Gatling gun. Clarifying where lines are drawn within that space opens up a number of cans of worms, which is one reason those opponents and organizations like the National Rifle Association are absolutists about barring new regulations.
The House should support the speaker's effort to ban bump stocks. "If you get a gun bill on the floor, you're going to have all the amendments on the left and all the amendments on the right".
So here we are talking about bump stocks.
However, the pair say it's not about the firearms or the accessories, it's about the people that use them and their bad intentions. In the second, the stock itself takes advantage of the weapon's recoil to rapidly depress the trigger over and over again. "I'd want to make sure that nobody had access to that, if that's the law of the land".
Feinstein's bill had support from 38 Democrats as of Thursday morning, including Sens. Richard Shelby of Alabama.
The statement pointedly noted that it was under President Barack Obama's administration that the devices were authorized to be sold and again urged Congress to enact one of the gun lobby's top priorities: a national "concealed-carry reciprocity" law that would require all states to recognize other states' concealed carry permits. "I don't think this is about bump stocks", Senator John Kennedy said.