All Human weapons require Ammunition or Ammo to fire. When a Human is low on Ammo, they can walk up to a powered Armoury and press 'B' to instantly have the weapon fully loaded. Ammunition is free. For Energy Weapons, the Human will have to go up to the Reactor or a Repeater and press 'B', or they can use the Armoury to sell the weapon and buy it anew, fully loaded, which can quickly be achieved by means of Binds.