Actually they 100% are. The usage of the comma in the English language has not changed in many hundreds of years. It’s pretty clear from the statement what the framers meant. You don’t need to look outside the statement. The words mean things all on their own. It’s not cryptic. It’s perfectly cogent and understandable.
The framers intended there to be no standing or national army. And therefore set about in the second amendment to establish the armament of state militias for the protection of the people. No more, no less. The modern application of the second amendment is a warped bastardization no matter how you look at it.