Na, as much as I wanted there to be a mistake, the media mis-identified a Saiga as an AR15 in the trunk, they kind of look like this one -
.
In the video, you'll see them clear a shell right at the beginning.
The media made a lot of mistakes at the beginning coverage, 4 guns total were recovered total, two long guns, 2 handguns -
Glock 10mm
Sig Sauer 9mm
AR 15 rifle
and
The Saiga in the trunk.
Here's the official crime scene report -
http://www.ct.gov/despp/cwp/view.asp?Q=517284 .