WASHINGTON (CBSNewYork/AP) — Congressman Peter King (R-N.Y.) says he plans to co-sponsor a bill banning “bump stocks,” like the ones the Las Vegas gunman used, apparently to make semi-automatic rifles fire like fully automatic weapons.

“I think these bump stocks should be – from what I know so far – should be banned. I don’t see any purpose for them,” he told WCBS 880’s Steve Scott. “I see no reason at all for them. I see no legitimate purpose they serve.

“So to me, rather than get involved in a long, involved debate, we should take quick action and show that Congress is responsive.”

King said the “bump stocks” basically turn a legal, semi-automatic weapon into an illegal, automatic weapon.

“So to me, it’s both morally, legally and common sense-wise the right thing to do,” he said.

For those second amendment supporters who think a ban would be the beginning of a “gun grab,” King added, “we have to use common sense.”

“The fact is, the Supreme Court has said that reasonable restrictions on use of weapons is constitutional – that under the second amendment you can place legitimate restrictions or regulations,” he said. “And this is certainly a very, very legitimate restriction.”

Other senior congressional Republicans have signaled they are open to considering a ban, too.

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The comments from lawmakers, including the No. 2 Senate Republican, John Cornyn of Texas, marked a surprising departure from GOP lawmakers’ general antipathy to gun regulations of any kind. But they were far from a guarantee of a path forward for the new legislation by Sen. Dianne Feinstein, D-Calif., especially with Majority Leader Mitch McConnell.

“If somebody can essentially convert a semi-automatic weapon by buying one of these and utilizing it and cause the kind of mayhem and mass casualties that we saw in Las Vegas, that’s something of obvious concern that we ought to explore,” Cornyn told reporters. “I own a lot of guns and as a hunter and sportsman I think that’s our right as Americans, but I don’t understand the use of this bump stock and that’s another reason to have a hearing.”

Cornyn later said he’d spoken with Judiciary Committee Chairman Chuck Grassley, and that Grassley was interested in convening a hearing.

House Speaker Paul Ryan (R-Wisconsin) said he too would be open to discussing a ban.

The devices, known as “bump stocks” among other names, are legal and originally were intended to help people with limited hand mobility fire a semi-automatic without the individual trigger pulls required.

They can fit over the rear shoulder-stock assembly on a semi-automatic rifle and with applied pressure cause the weapon to fire continuously, increasing the rate from between 45 and 60 rounds per minute to between 400 and 800 rounds per minute, according to Feinstein’s office.

The government gave its seal of approval to selling the devices in 2010 after concluding that they did not violate federal law.

Feinstein has a career-long history on the issue of guns after becoming mayor in San Francisco after her predecessor was gunned down. She authored an assault weapons ban that was in place for a decade before expiring in 2004, and said she had been considering trying to reintroduce that more sweeping legislation, as she’s done unsuccessfully after past mass shootings, including the one at Sandy Hook elementary school in Connecticut. Senate Minority Leader Chuck Schumer urged her to go with a narrower bill that might be likelier to draw support.

Feinstein pleaded with the public to pressure Congress to consider her legislation after the horrific violence earlier this week when a gunman killed 58 people and injured hundreds at an outdoor concert that she said her own daughter had considered attending.

“Mr. and Mrs. America, you have to stand up, you have to say ‘enough is enough,'” Feinstein said. “Why can’t we keep a weapon from becoming a military-grade weapon?”

Even the NRA, known for opposing any or all new gun regulations said in a statement that such devices should be subject to additional regulations.

The ATF wrote in a letter that it approved the bump stop because it’s not a firearm, but  afirearm part, and it doesn’t have any real jurisdiction over firearm parts.

At least one Republican senator, Ron Johnson of Wisconsin, said outright he was prepared to vote to ban “bump stocks.” ”I have no problem in banning those,” he said.

Sen. John Thune of South Dakota, the No. 3 Republican senator, said, “I’m interested in finding out more about bump stocks and I’ve got my staff looking into that and I know there are other members interested in finding out more about it as well.”

Even so, asked Tuesday about “bump stocks” and whether they should be legal, McConnell, R-Ky., said it was not an appropriate time to be discussing legislation.

In the House, meanwhile, Rep. David Cicilline, D-R.I., introduced a bill to ban the manufacture, possession, transfer, sale or importation of bump stocks. Rep. Dina Titus, D-Nev., whose district includes the site of Sunday night’s rampage, said: “The victims and families in Las Vegas don’t need an explanation about the difference between machine guns and firearms with bump stocks. They need action.”

President Donald Trump visited Las Vegas on Wednesday but said “We’re not going to talk about that today” when asked about gun issues.

(© Copyright 2017 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)

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