Nearly a month after the worst mass shooting in modern American history claimed 58 lives, Congress has failed to tighten regulations on so-called “bump stocks” — devices that let semiautomatic rifles fire nearly as rapidly as machine guns.

Even the National Rifle Association seemed to be on board with restricting the devices, which dramatically increase weapons’ killing power.

But a bipartisan House bill that would ban the “manufacture, sale and use” of bump stocks appears dead.

The NRA said any new regulations should come from the Bureau of Alcohol, Tobacco & Firearms instead of Congress, and House Speaker Paul Ryan said he would not bring the bill to the floor.