Legally-bought guns being used more often in crimes, sweeping U.S. report suggests

The most expansive federal report in over two decades on guns and crime shows a shrinking turnaround between the time a gun was purchased and when it was recovered from a crime scene, indicating firearms bought legally are more quickly being used in crimes around the country.

It also documents a spike in the use of conversion devices that make a semiautomatic gun fire like a machine gun, along with the growing seizure of so-called ghost guns, privately made firearms that are hard to…