It's what they said on Nightline this evening. They talked about both weapons, the number of shots fired as well as showing some computer animation that recreated the attack and the take-down. You might look at ABCNews.com for video on the Nightline page.
It appeared to show an assailant with a MAC-10 type weapon in each hand, and both were firing simultaneously and in FULL-auto mode.
Dumb-ass anti-gun msm pukes.