The M110A2 is a self propelled heavy artillery cannon. The howitzer is a fully tracked gun that shoots a 200 pound, 8″ (203mm) diameter projectile at an astonishing velocity of 2,300 ft. per second. It can reach a distance of 18 miles with pin point accuracy. It is manned by a crew of 13 men, 5 are carried on the M110 itself and the other crew is carried on the supporting M548, which also carries the ammunition for the howitzer. The M110 is fitted with a large rear spade which is required to keep the vehicle in place under the tremendous recoil. The M110A2 is the largest available self propelled howitzer in the Army’s inventory. Ammunition includes standard high explosives, bomblets, and high explosive rockets.