Well, this is still the law, according the Dick Act...
Dick championed the Militia Act of 1903, which became known as the Dick Act. This law repealed the Militia Acts of 1792 and designated the militia [per Title 10, Section 311] as two groups: the Unorganized Militia, which included all able-bodied men between ages 17 and 45, and the Organized Militia, which included state militia (National Guard) units receiving federal support.
Not the first time this has been addressed, SCOTUS used this to protect guns for militia use, US vs MIller, then came Heller which specifically covered individual right, The reality is gun grabbers know whats protected they don't care! Judges DON'T CARE. They get their paychecks and sign their exemptions into law.