We're all just expressing opinions, and none of us are lawyers, so it doesn't really count.
I think win-lose is trying to express his view as a matter of law when he is really addressing a matter of risk assessment. He really isn't addressing whether it is legal or not to have the AR in CT. It is illegal, and everyone agrees on that.
He is looking at risk, and he does have a point in that aspect. When you are in a vehicle on public roads, there is a lower threshold for search and seizure than in your home. So while it isn't any more illegal to have a AR in car than a home in CT there is a higher risk of getting caught.
Of course as a matter of law or risk, there still isn't any difference in whether you drive 10 minutes to a police station with an illegal gun or drive 10 minutes to a freer state with an illegal gun.