A federal judge has temporarily blocked a voter-approved California law that would have forced gun owners to get rid of high-capacity ammunition magazines by this Saturday. U.S. District Judge Roger Benitez, who is based in San Diego, issued a preliminary injuction Thursday that found the law was likely unconstitutional because it prevented people from using firearms that employed “whatever common magazine size he or she judges best suits the situation.” The law would have barred people from possessing magazines containing more than 10 bullets. “The State of California’s desire to criminalize simple possession of a firearm magazine able to hold...