Raytheon Missile Systems, Tucson, Arizona, has been awarded a $21,000,000 modification (P00004) to the ceiling amount of the previously-awarded indefinite-delivery/indefinite-quantity contract (FA8675-15-D-0135) for advanced medium range air-to-air missile system improvement program software architecture and design risk reduction efforts to counter evolving threats. This modification provides an increase in the maximum ordering amount of the contract, from $50,000,000 to $71,000,000, to facilitate new task orders. Work will be performed in Tucson, Arizona. All orders under this contract will be placed on or before Sept. 30, 2019 with a period of performance not to exceed Sept. 30, 2022. No additional funds are being obligated at the time of award. Air Force Life Cycle Management Center, Eglin Air Force Base, Florida, is the contracting activity.