I have just heard about this, and the above link pretty much sums it up for you. Pretty much, any civilian can not own a semi automatic weapon of any kind. This is said to be talked about the 17th of July by the UN, and if passed, the government would have to confiscate any weapons that are semi automatic.
I do not know if this would affect bolt action rifles and such that are modern and could still be as problematic as other guns.
I myself am against the bill, because the gangsters and such are going to get guns no matter what. You can not stop the bad guys from getting guns. However, you can only stop the law abiding citizens from protecting themselves.
I know that this bill will most likely be shot down, but just think about what would happen if it is not.