Not completely unimportant, the compass! At Milsim events you may need him, always handy to have one with you!
Fosco Carabiner with compass + thermometer
Carabiner with compass and thermometer.
Fosco Scout compass
Fosco Trooper Kompas
Fosco Ranger kompas
Fosco map compass
Compass Ultimate Horizon
Gerber Bear Grylls Compact Compass
Bear Grylls is calling the Compact Compass an invaluable tool.