They are effective, silent and inexpensive. For the more advanced fighter there are also several hi-tech melee weapons, such as swords, that give energy jolts to the victim when they hit, or energy whips. A projectile weapon uses some kind of material as ammunition. It can be the traditional bullet, or made of materials like water and Notum. The projectile weapon usually decides the range and firing rate, while the ammunition decides the damage and other effects.
Several weapons can use more than one type of ammunition.
Energy weapons are based on another principle. The ammunition is the same for all kinds of weapons. Only the capacity and number of shots are different from clip to clip. The weapon 'shapes' the ammunition into a shot with a certain range, rate of fire, damage and effect. It is important to remember that the available armor will have different effect on different kinds of weapons.