What if the M1 Abrams was redesigned to take down helicopters, drones, and even enemy tanks—all at once? Meet the AGDS (Air-Ground Defense System), a radical 1990s concept that proposed turning America’s main battle tank into the ultimate mobile air-defense platform. Packed with ADATS missiles, 35mm cannons, and advanced fire control, the AGDS was decades ahead of its time—and then forgotten. In this deep dive, we explore why the AGDS was designed, how it would’ve worked, and why it never left the drawing