Today, the Supreme Court issued a decision striking down the District of Columbia ban on hand gun ownership. Contrary to what some may think, the world has not been turned on its head, except that a rallying cry for the NRA and other forces that have used gun control as a wedge issue against Democrats for decades has been partially neutered.
The Court held that the second amendment right to bear arms is an individual, not just a collective right associated with having a state militia. But, it is still a limited right and is not totally disconnected from the concept of a militia. The court basically held that at the time of the founding the weapons that people had for personal protection are the same weapons they brought to their service in the militia. It is those weapons that the court says are covered by the Amendment.