I'm not worried about anyone coming to my door asking for any weapons I own. I don't believe any law enforcement agency would ever do that in their right frame of mind.
What I think will happen is the if the government knows which guns you own they will give you a "grace period" to either register the so called assault weapons or turn them in. If you make a statement saying you don't own them any more and a later caught with them then they will either fine you some massive fine and charge you with a felony. Or if you just ignore the request then they will do things like suspend your drivers license, put a lean on any property you own, garnish your wages, give the IRS lots more power to screw with you, force financial institutions to close your accounts, stop disability payment, stop pension payments and so on and so on. There is so much they can do to you to totally screw with your life its very scary, Obama has the same mentality with gun owners as he dose with the Coal industry, or any view he dose not agree with! The scary point there are many in the government that they think its the right way to deal with an issue.
HR4269 is very scary how they have it worded let see what he proposes tomorrow.
What really gets under my skin is the little prick that was in charge of Fast and Furious what just forced to retire, he should be getting 25years to life for what was done lets start making examples of the government hacks, also lets make it so if you cant qualify to own a firearm you can't hold ANY public office. Lastly if they get this crazy crap to pass then the Government, State and local government needs to become 100% responsible for ANY injury or loss due to any crime.