Bump stocks - devices used to convert semi-automatic weapons to automatic - were found among Paddock's guns and explain why victims heard what sounded like an automatic weapon fire when he killed 58 people and wounded hundreds more.
"Bump stocks" are accessories added onto semi-automatic rifles in order to simulate the firing style of an automatic weapon.
A product that can make a semi-automatic weapon fire nearly as rapidly as a machine gun was clearly under the radar of political Washington until the massacre of 58 people by a man whose astonishing personal arsenal included bump stocks.
"In Las Vegas, reports indicate that certain devices were used to modify the firearms involved".
A huge factor working in the gun lobby's favor is that America's political system, particularly in the Senate, overweighs the preferences of people living in sparsely populated rural states.
Bump stocks are typically sold online.
He says strict regulation of bump stocks would be consistent with U.S. Supreme Court opinion, "Because it said machine guns are outside the Second Amendment right and so, by extension, devices that alter a gun to make it machine gunish would be the same".
The NRA, which usually opposes any new restrictions, called for an immediate review into whether bump stocks comply with federal law. With the GOP in charge of Congress and the White House, new gun control regulations were a non-starter, and the assault weapons ban was allowed to expire in 2004.
Cornyn said as a hunter and sportsman he doesn't understand the use of the bump stock and wants to have a hearing on it.
We were assailed by the gun-rights crowd, of course, which said we wanted to disarm all law-abiding Americans.
On an average, more than 90 Americans lose their lives to gun violence every day, a daily toll of heartbreak and tragedy in communities across the US. "I think we're quickly coming up to speed with what this is". But people are less capable now than in the past to distinguish between fantasy and reality, and so we have massacres like Las Vegas.
A targeted approach of banning the aftermarket modification devices could be effective. Automatic weapons are already banned as part of the 1986 Firearms Owners Protection Act, signed into law by President Ronald Reagan.
Senior Republicans on Thursday signalled they were ready to examine the sale of "bump stocks".
Instead of calling for common-sense gun control, the NRA is only calling for action that makes strategic sense for the NRA.
WASHINGTON, D.C.: United States lawmakers bolstered efforts Thursday to ban the devices that the Las Vegas shooter used to convert his rifles into rapid-fire killing machines, and Congress may have found a surprising ally - the National Rifle Association.
After recent mass shootings there has been little willingness to look into gun control legislation, even measures such as expanded background checks that enjoy broad, bipartisan support among the public.
Clinton, in her 2016 campaign, helped instigate further gun purchases through such tactics as wanting to overturn a Supreme Court decision that she thought scuttled a Washington, D.C., law that people should lock up handguns that could lead to toddler deaths. Of the world's estimated 650 million civilian owned guns, almost half - 310 million guns - are owned by Americans.
President Trump said today that "we will be talking about gun laws as time goes by". Again, Congress needs to step up to the plate and pass comprehensive gun registration legislation.
And, Feinstein released her own statement arguing that Congress needed to weigh in on bump stocks.