In point of fact, the primary purpose of the Second Amendment was to protect the right of the several states to control their militias, and as a limitation of the power of the federal government over state militia’s under Article I, Section 8, Clause 15.
In point of fact you are obviously wrong as the 2nd Amend was drawn from the amendments proposed by the state of Virginia. Virginia proposed two blocks of proposed amendments The first block was entitled
That there be a declaration or bill of rights asserting, and securing from encroachment, the essential and unalienable rights of the people, in some such manner as the following: —
The 2nd block consited of structural changes to the Constitution rather than additions.
As indicated previously, the Bill of Rights provision to protect the unalienable rights of the people contained what was to become the 2nd Amend... it also contained
That the people have a right peaceably to assemble together to consult for the common good, or to instruct their representatives; and that every freeman has a right to petition or apply to the legislature for redress of grievances. That the people have a right to freedom of speech, and of writing and publishing their sentiments; that the freedom of the press is one of the greatest bulwarks of liberty, and ought not to be violated.
Plus many of the other individual rights provided for in the Bill of Rights.
Now the structural changes included a provision as follows:
That each state respectively shall have the power to provide for organizing, arming, and disciplining its own militia, whensoever Congress shall omit or neglect to provide for the same. That the militia shall not be subject to martial law, except when in actual service, in time of war, invasion, or rebellion; and when not in the actual service of the United States, shall be subject only to such fines, penalties, and punishments, as shall be directed or inflicted by the laws of its own state.
So unless you wish to violate every rule of statutory construction known to man, and wish to argue that Virginia passed two distinct amendments which mean exactly the same thing, then you would be wrong...
Further, when Madison introduced his draft of the Bill of Rights to the 1st Congress on June 8, 1789, his proposal was to amend the constitution by interliniation rather than by addendum... In other words, insert the amendments in the body of the constitution in the appropriate place where they belonged rather than sticking them in a single document as an appendix.
Now what is interesting is that Madison lumped the 1st , 2nd, 3rd, 4th and some of the 5th all together and were to be inserted "in article 1st, section 9, between clauses 3 and 4" --or just following the protections of the Writ of Habeas Corpus and the prohibitions against Bill of Attainder or ex post facto Laws... He lumped much of the trial by jury and rights of the accused in Article III relating to the judiciary. and the 10 Amend was to be placed in a brand new VII Article.
Now if you were correct, Madison would have placed the 2nd Amend not with other individual rights but either:
1.) Right around, or within Article I, Sec 8, Cl 15-16; or,
2.) In that brand new Article VII...(it relating to a power reserved to the states)
He did neither, he lumped it together with other individual rights in a portion of the constitution which was preserving individual rights.
Another factor which proves you wrong is the notes to Madison's speech to the 1st Congress introducing the Bill of Rights. What Madison states is that his version of the 2nd is superior than the one found in the English Bill of Rights because it was not "just for protestants only" and was not subject t a "mere act of parliament"... and of course, as everyone knows the right to arms found in the English Bill of Rights was then recoginized as an individual right ..
the mere having a gun was no offense . . . for a man may keep a gun for the defense of his house and family .
Mallock v. Eastley, 87 Eng. Rep. 1370, 1374 (K.B. 1744). Se also,
Rex v. Gardner, 87 Eng. Rep. 1240, 1241 (K.B.1739);
Wingfield v. Stratford, 96 Eng. Rep. 787 (K.B. 1752); accord,
The King v. Thompson, 100 Eng. Rep. 10, 12 (K.B. 1787) (it is “not an offence to keep or use a gun”

, and
Rex v. Hartley, II Chitty 1178, 1183 (1782) (“a gun may be used for other purposes, as the protection of a man's house.”

.
However that has been largely made obsolete by time, as the National Guard is now an adjunct component of the United States Army Reserve.
Irrelevant even if true, if you feel the 2nd is obsolete, you should repeal it. Until you repeal it, you can not ignore it.
Interestingly, an argument could be made that the deployment of State National Guard Units to Iraq and Afghanistan violates the Second Amendment.)
Obviously, you are unfamiliar with a unanimous decision of SCOTUS authored by Stevens and entitled Perpich v Dept of Defense. Nor do you seem to know anything about the dual enlistment clause or the existence of state defense forces authorized by 32 USC 109(c). When you have read that, get back to me with any questions.