What we know it means based on Supreme Court rulings..... It is a right reserved to the States to form militias It is an individual right to own firearms. Further we know that the TYPE of firearm protected by the second is MILITARY style weapons. There is no such thing as an assault rifle, but since everyone likes to use that term, IT is protected by the second. You don't have to read the second or believe me. The Court has said so. The purpose of the second is to provide the States with the ability to form militias from able bodied citizens. That Militia is to act as an army. A semi automatic rifle or pistol is the core of the armaments required. As established by the Supreme Court and our Founding fathers. No ban on "assault" weapons will stand. No Ban on 30 round magazines will stand and no ban on ammunition will stand. If Congress passes a ban it will go to Court and unless our Supreme Court Justices fail to follow the law and the Constitution it will be overturned. Further banning their further sale does nothing about the ones already out there. If we are to take our President at his word he wants to confiscate those weapons as well. Can anyone guess where THAT will lead?