So many 1911A1 pistols were produced during the war that the government canceled all postwar contracts for new production, instead choosing to rebuild existing pistols with new parts, which were then refinished and tested for functioning. From the mid-1920s to the mid-1950s thousands of 1911s and 1911A1s were refurbished at U.S. Arsenals and Service depots. These arsenal rebuilds consisted of anything from minor inspections to major overhauls of pistols returned from service use. Pistols that were refurbished at government arsenals will usually be marked on the frame/receiver with the arsenal's initials, such as RIA (Rock Island Armory) or SA (Springfield Armory).