[Earl from Silvis]

What part of “well regulated militia” don’t you understand?

[TBP]

That is merely a purpose statement. the operative phrase is "shall not be infringed." The intent was to protect teh people from tyrannical government -- by providing for them to have the means they had used to throw off the most powerful empire in the world. (That's why it's right behind the First Amendment protections of speech, religion, association, and the press, BTW.)