What we know is that Jared Loughner, who was rejected from the military and kicked out of a community college, and who had various minor run-ins with the law, was able to purchase a semi-automatic 9MM Glock with an extended magazine…
Under the federal assault weapons ban, enacted in 1994 and allowed to expire in 2004, these extended magazines, which can hold over 30 rounds, were prohibited. No company was allowed to manufacture any magazine that could hold more than 10 rounds.