Key Ruling: The Court held that the Second Amendment protects an individual's right to possess a firearm, such as a handgun, for traditionally lawful purposes like self-defense within the home, even when unconnected to service in a militia.
Impact: It struck down the District of Columbia's near-total ban on handguns and its requirement that lawfully owned firearms in the home be kept unloaded or disassembled.
I always found it amusing that getting a supressor is so hard, in the UK hard to get a gun but suppresors not so.