The 8-inch Gun M1 was a 203 mm towed heavy gun developed in the United States and was also used in small numbers by the British Army. Serious development began in June 1940 of an 8-inch (203 mm) gun that would have the longest range of any US Army field artillery weapon in World War II. The gun used the same projectile as the 8-inch coastal gun and the US Navy's 8-inch cruiser gun. The M1 consists of equilibrator assemblies, elevating and traversing mechanisms, two single-wheel, single-axle heavy limber, and a two-axle bogie with eight tires and two trails. After 1962 it was designated the M115 Howitzer
