Federal agents on Thursday raided one of the nation’s largest manufacturers of ghost-gun parts, a sign that federal law enforcement is cracking down on kits that allow people to make weapons at home.

On a Saturday evening in the fall of 2020, Los Angeles County Sheriff’s Deputy Claudia Apolinar and her partner parked their police cruiser in downtown Compton with plans to keep watch over a Metro ...

To the untrained eye, two black, square-bodied 9mm pistols, side-by-side, look nearly indistinguishable. But a closer look reveals a difference. One has no serial number, and it was made at home from ...