1. Ordinary citizens. NOT professionals. NOT people trained, paid, and employed by the government.
2. The people that can be called up in an emergency. You know. Like most of us here in the US. It's an option that Shrub hasn't used because of it's unpopularity, but it's an option. It's been used before.
This is NOT the only right in the Bill of Rights that doesn't apply to an individual. It is NOT a right to serve the state, no matter how the anti-gun nuts want to spin it. It explicitly refers to the citizenry. The Bill was NEVER intended to reserve rights exclusively to the government; it was DESIGNED so that the government can't pull the crap that the anti-gun nuts want to pull.
Now - to throw the ones that want ONLY government employees to be armed a bone, it does say "well-regulated". We can keep 'em, we can bear 'em - but using them inappropriately should be HARSHLY punished, IMO. Nowhere are we granted the right to shoot people.
Ceding individual rights to the collective is not the way to go.
And BTW the American Heritage Dictionary is not a right wing dictionary.