McAlester Army Ammunition Plant (MCAAP) is a weapons manufacturing facility in McAlester, Oklahoma. Its mission is to produce and renovate conventional ammunition and ammunition related components. The plant stores war reserve and training ammunition. McAlester performs manufacturing, industrial engineering, and production product assurance. The plant also receives, demilitarizes, and disposes of conventional ammunition components. The plant is government-owned and government-operated. It is located in Pittsburg County, Oklahoma, southwest of the city of McAlester.