The Supreme Court’s swing justice isn’t so sure about the meaning of the Second Amendment. “The Constitution of the United States is a flawed document,” Justice Anthony Kennedy said at a conference of the Ninth U.S. Circuit Court of Appeals on Monday. In 2008, he voted in the majority to overturn a ban on handguns, saying the Second Amendment protects an individual’s right to possess certain firearms at home. Previously, the court interpreted the right to bear arms as applying to a “well-regulated militia.” Critics say because the court took centuries to declare an individual right to bear arms, it doesn’t exist. “I’m not so sure” about that argument, Kennedy said.