[jonrick46]

Check out the enlarged view in the circle. Is that a handgun near the beverage cup?

Is a variant of the MAC 10 .45 (Semi Auto)?

[Dr. Bogus Pachysandra]

Looks like one. But they don’t have those in NYC!

[Tatze]

Looks to me to be a handgun with the slide locked open, and two magazines on either side. I don’t think its the MAC 10 in your second image.

[AndrewB]

I heard one spokesman explaining that the collateral damage was due to the fact that the shooter used a “sawed off shotgun”. I guess one of these could be mistaken for that by the uninformed.