Abstract: The invention relates to armor penetrating bullets suitable for use with a wide range of weaponry from automatic shoulder arms to hand guns. The invention provides a bullet which comprises a cartridge containing a propellant charge, a casing attached to the cartridge, and a plurality of individual flechettes contained in the casing. The bullet provides high penetration through stiff materials such as body armor made of interwoven fibers but the individual flechettes are most easily stopped in softer material.