Just to chime in... I hope people don't react too irrationally to this IDIOT PSYCHO that made a series of stupid decisions... and then acted on them. My heart really goes out to the victims there.
The cops reacted like pros and so did the other first responders.
For selfish reasons (like owning ARs, hi-cap mags, etc.), I hope that gun laws don't drastically change or tighten up. I am ok with (and part of me even agrees with) the current process to purchase a gun in general. Waiting periods aren't the end of the world, but it quickly becomes a slippery slope -- I hope we don't lapse back to the Clinton-era bans.
All that said, my heart really goes out to those people in CO.
I agree with you there, but it's ironic that even if that ban was still in place, it wouldn't have prevented the use of an AR with a beta-mag. The AR would just have looked a little less "scary" and the magazine would have cost him more money. That's the thing with trying to ban things based on how they look...