The high court’s unanimous ruling builds on a series of cases it has decided since 2013, when it struck down a portion of the state’s felony gun law that calls for serious penalties for anyone caught toting a loaded gun outside their home. The justices ruled that section of the state law violated the Second Amendment right to publicly carry loaded firearms. In a separate ruling two years later, justices further clawed back the law — this time setting aside restrictions to carrying loaded guns on the streets, sidewalks and other “public ways.”