...and to the extent that a law does violate the 2nd Amendment, it is forbidden for the states to enforce such a law (and the 10th Amendment doesn't change that

...and to the extent that a law does violate the 2nd Amendment, it is forbidden for the states to enforce such a law (and the 10th Amendment doesn't change that). I don't see the relevance of the 10th Amendment to this particular discussion. EDIT: I see. The person to whom you replied seemed to be looking for the power somewhere, and you are just saying that the states powers are not enumerated (as the federal powers are).