No one should be able to arm themselves like that as easily as he did.
You know how fast low-IQ thugs in Chicago, with its oppressive gun laws, can arm themselves? (Some might just call a family member south of the border and get them via Eric Holder. )
The medical student Aurora shooter is said to have armed himself over months. NO anti-2nd Amendment gun laws would have stopped a nut like him. A few armed people in the audience might have.