Primal Armor (PA) is a defensive shield that is created around NEXTs by molding a sustained flow of Kojima Particles around the craft's hull. The purpose of Primal Armor is to reduce damage taken to the craft's armor. However, absorbing attacks will drain the Primal Armor's effectiveness until it can be recharged. Weapons with high PA Attenuation (PA reduction) and PA Piercing (ability to break through PA) are able to render PA almost useless. Because Kojima Particles are highly pollutive, PA use is strictly banned in developed areas, or areas with civilians. The Kojima Particles used for PA are also used to power Kojima weapons, as well as a highly powerful 360 degree explosion called Assault Armor (AA).