Quote Originally Posted by MadMojoMonkey View Post
Whatever the reasons we claim that it's OK for the military to own whatever weaponry, apply that logic to everyone.
I.e. if it's because military personnel are highly trained, well... anyone can be trained.
If it's because the military does rigorous background checks and various training and evaluations of an individuals trustworthiness and ability to remain calm under pressure, then OK... make that same standard a requirement for everyone.

Basically, the military doesn't just put anyone in a pilot seat of a fighter jet. Whatever their criteria are to choose whom is suited can be applied to anyone, whether or not they're enlisted.
The military has an ongoing mission that requires certain tools. While a citizen's aims may necessitate an overlap with the military's tool set, there are certain armaments that there is no justifiable reason for a citizen to own, i.e.: nuclear weapons.

Essentially your answering the how, but I'm asking the why.