Blah, I hate airsoft. Pay money to get a plastic gun and shoot little plastic balls. MILES is much more fun
. It's like laser tag with real guns and that people die depending on where they're hit and how many hits they've taken. The cool thing is that can you real vehicles for example the HMMWV and even a Bradley (only used in offical Army exercises). Also, the guns simulate how real bullets would react. The only downside about MILES is that it's a bitch to reset.
EDIT: This is a photo of some soldiers playing MILES for a training exercise. You can see the guns that are used (real M16 and M249).
http://upload.wikimedia.org/wikipedia/en/0/05/Fibua.jpg