Raytheon Missiles and Defense, Tucson, Arizona, is being awarded a firm-fixed-price modification to a previously awarded other transaction prototype agreement to exercise an option. The value of this modification is $41,499,870, which increases the total value of the agreement to $62,468,454. Under this modification, the performer will continue to further develop and refine their concept leading to a system requirements review – prototype (SRR-P).  The work will be performed in Tucson, Arizona; El Dorado Hills, California; Tewksbury, Massachusetts; and Huntsville, Alabama. The modification period of performance is from June 27, 2022, through Feb. 15, 2023. This initial agreement was competitively awarded using other transaction authority provided by 10 U.S. Code 4022 through the Enhanced Hypersonic Defense Broad Agency Announcement with Glide Phase Interceptor Special Topic, HQ0851-21-S-0001. Research, development, test, and evaluation funds in the amount of $36,996,720 are being obligated at the time of award. The Missile Defense Agency, Dahlgren, Virginia, is the contracting activity (HQ08512290003).