Ordnance QF 25-pounder
Making the 25-pounder before the Second World War was hard, because there was not enough money to fund building new guns. The British Army made the decision to change the barrels of the 18-pounders into new ones, and then change the rest of the gun later when money was available. This barrel fired shells that weighed about 25 pounds, and were 3.45 inches thick. It was placed on the carriage (a platform that could be rotated) of newer 18-pounders when it was fired. This made the gun put most of the recoil force into the ground, making it more stable when it fired. The platform gave the gun a smooth surface to rotate on when it was firing, which let soldiers operating it move the barrel faster.