It doesn't exist as of now because the American people have not seen fit to organize themselves into one. This probably indicates that the need has not yet arisen. It also doesn't mean that the need will never arise.2- Despite given ample opportunity, neither you nor anyone else has offered any evidence that the militia in the 21st century is anything other than a fiction on paper that does not exist in real life.
I don't understand what you mean by "be required." Required by whom exactly? If the people decide to form an active militia, they will decide what weapons they need. Who am I to decide this?3- Despite being asked several times, neither you nor anyone else can produce a list of what weapons any such militia would be required to bring with them - if any - let alone that the items you are advocating for are or would be on such a list.
If you think that a militia is not necessary to the security of a free state that's your choice. Apparently the founders felt differently, which is why they took steps to ensure that the people would always be adequately armed with militarily effective weapons.4- Our nation is not kept a free state by any fictional militia but rather by a professional armed forces for well over the past two centuries.