I've had this question burning on a back burner in my mind for awhile now.
Just what is mil-sim?
What I have gathered it seems to involve these things:
1. Gear that falls into the category "Go fast."
1a. As much of this that you can get. You must wear as much of this as possible at one time.
2. Buying as much as you can in multicam pattern.
2a. Complaining about the cost of multicam pattern.
3. Using the above gear to cosplay at games.
3a. Complaining that other people at that game are using a slightly wrong variant of one thing or another.
Comment: I have seen posts dedicated to finding the correct leather belt. It was simply a leather belt, nothing all that special about it.
4. Going to games labeled mil-sim. Game must be either a cold war fantasy/ cleaned up Vietnam/ or "modern events."
4a. Later complaining about the quality of above game. Calling it glorified force on force. Further complaining that no one really showed up either.
6. Yelling at each other.
6a. As what I have gleamed this is due to that most airsoft teams and individual players do not regularly interact with long chains of command.
That is what I have gleamed about mil-sim. So if you can construct a more accurate construction of this rather non-descriptive term and game play style, I'd really like to know what it is.