I have one, and could never really answer that question to full satisfaction for Connecticut. It appeared to me to be legal, but also appeared to me that a cop could arrest me and then it would be up to the court to decide if it was legal or not.
Which doesn't help you at all I'm afraid.
I can say this - I shot mine yesterday with my wife and a couple of friends who've never shot it before. I've got a couple of 33 round mags for it and a decent red-dot on it. Took it to one of the tactical pits and set up some bowling pins about 100 feet away and everyone just kind of giggled as they plinked at them. It's that kind of gun.