The Supreme Court invalidated the Trump-era ban on bump stocks along ideological lines on Friday, ending the nationwide ban on the devices, which convert semi-automatic weapons to fire hundreds of rounds per minute. 

The Biden administration defended the regulation in front of the high court after the Trump administration first implemented it in the wake of the 2017 Las Vegas mass shooting, the deadliest in U.S. history. The shooter had used a bump stock to kill 58 people and wound hundreds of others. 

Both the Trump and Biden administrations have since made possessing the devices a criminal offense by newly classifying them as machine guns under longstanding federal law.  

In a 6-3 decision authored by conservative Justice Clarence Thomas, the court said the classification is an impermissible reading of the law, ruling in favor of the challenger. ... Read More: The Hill