Can someone tell me where in the 2nd amendment it says you can carry machine guns?

[Thumpalumpacus]

... which implies we have the right to keep and bear arms.

True , but that right is not granted by the second amendment. It was considered a natural right. That is why the first ten amendments put restrictions on the federal government. If we want to argue that the second amendment does not guarantee the right to bear any weapon of choice it seems to me an updating of the constitution is in order.

The right is not only implicit in 2A, the 9th and 10th amendments reserve unenumerated rights to citizen and the states.

It's pretty simple. American jurisprudence has recognized that such a right, with limitations, exists.