You forgot, "A well regulated Militia, being necessary to the security of a free State,..." which is where I think he means arguably. It's worded in a way that leaves interpretation, the argument being that the opening phrase is a precondition. The debate over it's meaning amongst scholars is basically at a draw. The best thing people could do is push for an amendment to the constitution that clarifies the individual's right. If the NRA and other advocates spent a large portion of their time doing this instead of foolishly battling interpretations, this argument might be dead by now. I suppose there might not be as much money in it for them though if the matter is mostly settled.