The only logical outcome of registration is confiscation. Happened in CA, NY and Nazi Germany (they just registered all the Jews). It may not be the desired outcome of the current legislators, which I question, but it sets the ground work for future abuses and must be treated as an assault on our civil liberties.
FWIW I have dealt with the anit-gun zealots in CT, I weep for my country if this is the lead they follow. Grassroots at the state and local levels is where the fight is and our enemy has the high ground.