What Scalia actually said that the reporter parsed in a way calculated to create maximum controversy and thereby draw eyes to the story:
"When asked if that kind of precedent would apply to assault weapons, or 100-round ammunition magazines like those used in the recent Colorado movie theater massacre, Scalia declined to speculate. "We'll see," he said. '"It will have to be decided."
As an originalist scholar, Scalia looks to the text of the Constitution—which confirms the right to bear arms—but also the context of 18th-century history. “They had some limitations on the nature of arms that could be borne," he told host Chris Wallace."
Pretty much the same thing he said in the majority Heller decision.