The Model 1841 6-pounder gun was one of a family of weapons designed by the U.S. Army Ordnance Department in 1841 (companion pieces were the Model 1841 12-Pdr., 24-Pdr. and 32-Pdr field Howitzers; the Model 1841 12-Pdr Gun and the 12-Pdr Mountain Howitzer). The effectiveness of the 1841 series was proven in the Mexican War, during which U.S. Ordnance gained an outstanding reputation for maneuverability and reliability. Most 1841 6-pounders were cast in bronze but in August and September 1841. at West Point Foundry, Captain William Maynadier inspected two cast iron 6-Pdr guns identified in the record as Model of 1841. Of essentially the same length and weight as those of bronze for the same model year, their base rings were 0.7 inches larger, or eleven inches in diameter, further supporting the tradition of broader taper for cast iron than for bronze weapons. The 6-Pdr was common to both armies in the early war years. The piece gradually fell into disfavor at the introduction of the Model 1857 Napoleon because of the bigger bore and hitting power. However, in the western theater the 6-Pdr soldiered on until the end of the war.