That statement is the reason the Feds are interested in and want from the American people; otherwise, the Second is a recognized and individual right asmare all the other rights in the Constitution. In short, the "militia clause" does not condition or modify "the right to keep and bear arms...." It only says what the Feds want from that right, pursuant to its powers in Article 1. This is the interpretation shared by most constitutional scholars, historians, political scientists who have studied the Second.

And the intrpretation of the SCOTUS.

BTW, "well regulated" meant that citizens were to report when called with a weapon suitable for militia service and with the knowledge of how to use it; training was left to the states.