The #WarBox is based on the idea of the PirateBox: a small box that contains all hardware needed to perform a certain action, like scanning.
The hardware for the #WarBox can be looked up in detail in hardware section. The following is a short overview of what parts would be needed to create a stable, good working machine:
~:$ pacman -S iw wireless_tools wpa_supplicant dhcp hostapd iptables screen
~:$ # Login again to make the change effective ~:$ usermod -a -G kismet $YOURUSERNAME