Piffka wrote: He does seem to have it all thought out (more panic).
Did that include talking to someone who's actually gone through the experience he is seeking, and who wasn't paid to manipulate him? I'm asking because the actual army experience differs from the recruiters' sales pitch in many ways, most of them non-obvious. For instance, my own experience as a draftee in the German army included endless stretches of boredom as we kept polishing our already-clean equipment. Note that unlike bosses in a real company, military bosses aren't paying for your time, so they can waste as much of it as they feel like -- and routinely do.
There are probably more non-obvious deviations from the salespitch, and chances are neither I nor anybody else here knows them. That's why it's important to talk to an independent veteran. If your son doesn't know one personally, I'm sure he can find one in some suitable internet newsgroup. Of course, this person might just tell your son that his experience was great, and that he should go for it -- in which case you'll just have to live with your sons first Big Decision as a grown-up.
Whatever happens -- good luck!