For more than 200 years the US Supreme Court has held that the Second Amendment applied to State Militias. They literally scoffed at the idea that it applied to individuals. Then Scalia and his pals completely changed the interpretation in line with decades of lobbying by the NRA.
I find it strange that the amendment calls for a well regulated militia, but Scalia and Co think that no such regulations should be applied to any individual who wants to go around using a weapon of war.