Six Days in Fallujah

We all know ammo is important but lets say your out of ammo on any kind of weapon you are carrying will there be a way to get ammo or maybe the ability to take ammo/weapon from killed enemy or maybe a supply station???

Hello as a iraqi sandstorms used to be very common will there be missions where a sandstorm is happening and how will it effect the gameplay and second of all if theres missions in night will there be the opition to swap and use tracer bullets???