The US Army adopted a 155mm gun from the French in 1917. They liked the caliber and in the 1930s developed a modern version, producing one of the finest guns of the war years. The 155mm M2, which inevitably became known as 'Long Tom' was on a split trail carriage with eight wheels under the gun and a two-wheel limber for towing. To go into action, the limber was removed, the trails opened, and the wheels lifted off the ground, giving a solid platform which paid off in accuracy. The long barrel was balanced by two hydro-pneumatic cylinders attached to horns above the breech. The recoil system adjusted the length of stroke as the gun was elevated, and the gun could be uncoupled from the recoil system and pulled back across the trail for traveling, to equalize the weight. Sold Out!