States Sue to Stop Return of Seized Machine Gun Conversion Devices

A coalition of Democratic-led states filed a lawsuit on Monday challenging the Trump administration’s reversal of a Biden-era effort to curb the spread of devices that turn semiautomatic rifles into makeshift machine guns.

The lawsuit, filed by 15 states and the District of Columbia in Federal District Court in Maryland, came after the Trump administration abandoned legal efforts to stop distribution of the devices and agreed to return thousands of the devices the government had seized.

The lawsuit focused on one specific device known as a “forced-reset trigger,” which the lawsuit said are commonly installed on...