After reading the attachment it looks very similar to the laws that they already have in Chicago where the incident this bill is named after happened. Maybe someone from Illinois can clarify this. If it is then there is the proof that these kinds of bills do not stop criminals who are determined to kill and no one is allowed to defend themselves.
Yeah even the NRA isn't wasting resources on this one. Look right now, very few politicians are willing to attack the 2nd amendment right now because of the AWB in 1994 cost too many of the politicians their seats. This is actually remembered by those in power right now. What they are planning on doing is skewing the Census so they can redraw lines and gain more power in the house and senate so they can do what ever they want without the threat of losing their power in easy terms.
In any case, I think the only way we can begin to overthrow the government is if some general like General Pace or General Patreus lead it. If one of them started I guarantee most people would pick up their guns and follow suit.