
It was an accessory, not a conversion device.’’ But sometimes you have to make a decision you don’t necessarily like. “It took a lot of study because ATF is concerned about safety.

“It did not meet the definition of a machine gun,’’ Vasquez said. Federal authorities determined the technology to be a legal accessory that - when used - did not convert the weapon into an actual machine gun, said Rick Vasquez, a former acting chief of the Firearms Technology Branch at the Bureau of Alcohol Tobacco Firearms and Explosives, who was part of the team that reviewed the bump-stock technology. The technology was subjected to weeks of review to determine whether it could be classified as an illegal conversion device.

The technology relies on recoil energy produced by gun fire to expend rounds in rapid succession and could be readily purchased online or from private dealers, without government regulation. More: Country star Caleb Keeter changes guns stance: 'I cannot express how wrong I was' More: 23 weapons were found in Las Vegas shooter's hotel room: What we know now
