The M551 “Sheridan” AR/AAV was a light tank developed by the United States and named after Civil War General Philip Sheridan. It was designed to be landed by parachute and to swim across rivers. It was armed with the technically advanced but troublesome M81/M81 Modified/M81E1 152mm gun/launcher, which fired conventional ammunition and the MGM-51 Shillelagh guided anti-tank missile.
Main Gun: M81E1 Rifled 152 mm Gun/Launcher
MGM-51 Shillelagh missiles
Secondary: 12.7 mm M2 Browning Machine gun