I'm compiling a list of things I and my fellow artists might want to learn more about if we end up drawing concept art for a video game. For example, the closest I've been to a gun in real life is a paintball range. Here's some advice I got:

• Bring in an expert. (I know some retired military members have offered their expertise on games and movies before-- although I can't remember specific titles)
• Basic firearm anatomy and safe operation
• Trigger discipline
• Ammo vs. clips
• The difference between full auto, semi auto, and single shot
• Proper grip position
• What does and doesn't count as a "bullpup"

In the person's opinion, the artist shouldn't go overboard with it. They didn't like how complex the guns were in ARMA, and it's not fun when video game guns jam, get rusty, break, etc. What else should I read up on? Cars and ships? Animal behavior? Please lemme know.