The M110A2 is the latest version with double muzzle brake, the earlier A1 version had a plain muzzle. It first entered service with the US Army in 1963. It has been used in the Vietnam War by the United States Army, and in Operation Desert Shield and Operation Desert Storm by the United States Army, and the British Army.
With a range of 20 miles, it has pinpoint accuracy. Being mounted on a tracked chassis allows it to support infantry or armor in nearly all terrain conditions. Ammunition includes standard high explosives, bomblets and high explosive rockets.
The gun system has been retired from US Army service and the gun barrels have been used as the outer casing in the manufacture of the GBU-28 bunker buster bomb.



