A San Diego federal judge has issued a ruling that blocks four provisions of California’s strict handgun law, becoming the second U.S. district judge within two weeks to rule that parts of the state’s Unsafe Handgun Act likely violate the Second Amendment. Judge Dana Sabraw’s ruling in the San Diego case could potentially open the door for Californians to purchase hundreds of types of semiautomatic pistols that state officials currently deem “unsafe” and thus do not include on a roster of approved handguns. But the judge issued a stay on his decision, giving Attorney General Rob Bonta time to appeal...