The expanded demands on United States military forces highlights the deficiency of single-use, small-arms bullets and projectiles. Current bullet technology is separated into two general categories: (1) lethal bullets consisting of high-velocity (>300 m/s), metal projectiles and (2) non-lethal bullets consisting of non-metallic materials fired at lower velocities (<100 m/s). This approach to bullet technology burdens the user in two respects: non-lethal bullets are typically incompatible with weapons designed to fire lethal projectiles; and the logistics supply of multiple-mission forces is complicated by single purpose bullets. The solution is a single bullet optimized for both missions. The proposed concept provides lethal and non-lethal capability in one projectile. This dual-response capability is achieved by altering the strength properties of the bullet during flight. The new concept is easily integrated into current bullet designs and compatible with fielded weapon technology. The Phase I effort will focus on the design and demonstration of the new projectile. The proposed concept is an inexpensive and effective device for the disruption of humans and material. A unique dual-mode capability facilitates its use in military and civilian operations. Military applications include combat, peace keeping, and security activities. Civilian applications include riotcontrol and hostage situations. The proposed concept offers an alternative to deadly force without sacrificing the lethal response option.