America's mass shootings are as much about the free trade of bullets as they are about gun sales. Take, for instance, the Uvalde, Texas, shooting that killed 19 school children and their two teachers.

SACRAMENTO — Sold from vending machines in Pennsylvania, feed depots in Nevada, pharmacies in Georgia and jewelry stores in Texas, ammunition is in many states easier to buy than cold medicine. But in ...

New Jersey officials on Wednesday released a long-awaited report on gun “microstamping” technology that would make it easier for police to solve gun crimes, an “important step” toward making every ...