You've heard their lies. Not only does the Constitution allow the formation of a Federal Army, it specifically recognizes state militias, and confirms that the citizen and his personal armaments are the foundation of the citizen militia. The arming of the militia is not left to the state but to the citizen. Should the state fail to arm its citizen militia, the right of the people to keep and bear arms becomes the source of the guarantee that the state will not be found defenseless in the presence of a threat to its security. It makes no sense whatsoever to look to the Constitution of the United States or that of any state for permission to form a citizen militia.
Logic demands that the power to grant permission is also the power to deny permission.
Brought to its logical conclusion in this case, a state may deny the citizen the right to form a militia. If this were to happen, the state would assert itself as the principle of the contract making the people the agents. Liberty then would be dependent on the state's grant of liberty. Such a concept is foreign to American thought. While the Second Amendment to the U.S. Constitution acknowledges the existence of state militias and recognizes their necessity for the security of a free state and while it also recognizes that the right of the people to keep and bear arms shall not be infringed, the Second Amendment is not the source of the right to form a militia nor to keep and bear arms.