Republicans open to banning 'bump stocks' used in massacre

For a generation, Republicans in Congress — often joined by conservative Democrats — have bottled up gun legislation, even as the carnage of mass shootings grew ever more gruesome and the weaponry ever more deadly. A decade ago, they blocked efforts to limit the size of magazines after the massacre at Virginia Tech. Five years later, Republican leaders thwarted bipartisan legislation to expand background checks of gun purchasers after the mass shooting at an elementary school in Newtown, Conn.

Last year, in the wake of the Orlando nightclub massacre, they blocked legislation to stop gun sales to buyers on terrorism watch lists.

But in this week's massacre in Las Vegas, lawmakers in both parties may have found the part of the weapons trade that few could countenance: previously obscure gun conversion kits, called "bump stocks," that turn semiautomatic weapons into weapons capable of firing in long, deadly bursts.

"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," Senator John Cornyn of Texas, the No. 2 Republican in the Senate, said, adding, "It seems like it's an obvious area we ought to explore and see if it's something Congress needs to act on."

. Cornyn said the continuing legality of the conversion kits was "a legitimate question," and told reporters he had asked Senator Charles E. Grassley of Iowa, the Judiciary Committee chairman, to convene a hearing on that issue and any others that arise out of the Las Vegas investigation.

Other Republican senators, including Lindsey Graham of South Carolina, Orrin G. Hatch of Utah and Marco Rubio of Florida, said they would be open to considering legislation on bump stocks.

"We certainly want to learn more details on what occurred in Las Vegas," . Rubio said, "and if there are vulnerabilities in federal law that we should be addressing to prevent such attacks in the future, we would always be open to that."

In the House, Representative Carlos Curbelo, Republican of Florida, said he was drafting bipartisan legislation banning the conversion kits. Representative Mark Meadows, the head of the conservative Freedom Caucus, also said he would be open to considering a bill, while Representative Bill Flores, Republican of Texas, called for an outright ban.