Well, airsoft isn't the army per se. Though same basic discipline applies when running a game. Many people who play don't have any military expertise. But just like the military, airsoft players can be bred to play the part with training and practicing and going to games and mentoring from guys on the field and all that stuff. Some are more easy to teach while others take time to discipline.
Put in some work and you wont 'feel' like a poser.
Originally Posted by talon
Talk to the host beforehand, ask him what he/she if you can show up how you'd like.
In fact, I recommend that you do so before you make any purchase, get into contact with a game host whose game you'd like to try, and work from there!
Some good advice right there.