Not only does the 2A guarantee the RKBA, but many State Constitutions read very similarly. This from Washington State constitution:
SECTION 24 RIGHT TO BEAR ARMS.
The right of the individual citizen to bear arms in defense of himself, or the state, shall not be impaired, but nothing in this Section shall be construed as authorizing individuals or corporations to organize, maintain or employ an armed body of men.
With regard to the militia:
RCW 38.04.030
Composition of the militia.
The militia of the state of Washington shall consist of all able bodied citizens of the United States and all other able bodied persons who have declared their intention to become citizens of the United States, residing within this state, who shall be more than eighteen years of age, and shall include all persons who are members of the national guard and the state guard, and said militia shall be divided into two classes, the organized militia and the unorganized militia.
Rather clear, I'd say. Another provision goes on to describe the composition of the organized, formal militia but does not mention we the unorganized again. Likely that the States were following the lead from the national level.
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