The Probert Encyclopaedia of Warfare

SABOT

Sabot is a lightweight carrier surrounding a heavier projectile of reduced calibre, allowing a firearm to shoot ammunition for which it is not chambered. For example, a hunter could use his .30-30 deer rifle to shoot small game with .22 centre fire bullets. SABOT is a type of armour-piercing ammunition based upon kinetic energy. Effectively a SABOT round consists of a super-hard metal bullet which is fired at high velocity to penetrate armour.
Research Sabot