Since the 2010 Supreme Court case McDonald v. Chicago, which applied the ruling in the 2008 Heller case (which said the Second Amendment guarantees an individual right to bear arms) to states and localities, the Court has so far evaded any new case about the limits and meaning of the Second Amendment.
Those two cases, though, did not resolve all the important questions about how and when and why the government can restrict Second Amendment rights. Heller and McDonald said that the right to possess commonly used weapons for self-defense in the home cannot be infringed, but Justice Antonin Scalia in his majority opinion in Heller explicitly said this didn’t mean anything goes when it comes to Americans and their guns.