A shredder round is a type of United Nations Space Command projectile rifle ammunition that is designed to splinter on impact, tearing through light armor and "shredding" targets into ribbons. They are usually fired from assault rifles as a replacement for armor piercing rounds. However, shredder rounds have a severe lack of penetration power and they are all but useless against Covenant personal shields. They are most often used against massed enemies with light armour such as grunts.