If you read the second Amendment, and the debate that lead up to it, the whole point of it is not to guarantee hunters or other sporting use of firearms, it is to protect citizens from a tyrannical government. Thus, limiting magazine size is unconstitutional, if we are going to protect ourselves from the government we need arms with enough firepower to battle the tools of politicians, our military and police. Therefore, magazines should in theory be unlimited in size, but like all things in our government, a compromise has been met. In reality the only legitimate use of a firearm given by our Constitution is to remove a tyrannical government from power, or prevent them from taking power.
