Raytheon Missiles and Defense, Tucson, Arizona, is awarded an $113,628,201 firm-fixed-price modification to previously awarded contract N00024-21-C-5406 for MK 15 close-in weapon system (CIWS) upgrades and conversions, system overhauls, and associated hardware. Work will be performed in Louisville, Kentucky (37%); Tucson, Arizona (13%); Mason, Ohio (6%); Williston, Vermont (5%); Hauppauge, New York (2%); Joplin, Missouri (2%); Radford, Virginia (2%); Palo Alto, California (2%); Andover, Massachusetts (2%); Van Nuys, California (1%); Anaheim, California (1%); Valencia, California (1%); Irvine, California (1%); Tempe, Arizona (1%) and various other locations each less than 1% (24%), and is expected to be completed by September 2026. Fiscal 2023 operations and maintenance (Navy) funds in the amount of $70,496,178 (62%), fiscal 2023 shipbuilding and conversion (Navy) funds in the amount of $41,316,038 (36%), fiscal 2021 weapons procurement (Navy) funds in the amount of $804,046 (1%), and fiscal 2022 weapons procurement (Navy) funds in the amount of $11,939 (1%), will be obligated at time of award, of which $71,300,224 will expire at the end of the current fiscal year. The Naval Sea Systems Command, Washington Navy Yard, Washington, D.C., is the contracting activity.