By now, we know that states and local governments can't unduly burden an individual's right to own a gun. That hasn't stopped governments from coming up with other ways to enact meaningful gun regulations, though.
In addition to making bullets more expensive, cities and states have enacted laws limiting the sizes of magazines. In Sunnyvale, California, the city prohibits anyone from owning magazines that hold more than 10 rounds. The Ninth Circuit today agreed with the district court that a preliminary injunction staying enforcement of the ordinance wasn't warranted.