Raytheon Missiles and Defense, Tucson, Arizona, is awarded a $225,638,545 cost-plus-fixed-fee contract for AIM-9X Block II and Block II+ System Improvement Program Increment IV to include hardware and software development to the AIM-9X system as well as test and integration of developed hardware and capabilities. More specifically the hardware development will include updates to the AIM-9X sensor, electronics unit, and guidance unit and the software efforts include the development of the operational flight software versions 10.5 and 11.5 and integrated flight software. Additionally, this contract provides program protection, cyber security, information assurance and training for the AIM-9X system. Work will be performed in Tucson, Arizona (80%); Goleta, California (9%); Newtown, Pennsylvania (5%); North Logan, Utah (1%); and various locations within the Continental United States (5%), and is expected to be completed in September 2027. Fiscal 2022 research, development, test and evaluation (Navy) funds in the amount of $1,750,000, fiscal 2022 research, development, test and evaluation (Air Force) funds in the amount of $2,776,621, fiscal 2022 weapons procurement (Navy) funds in the amount of $700,000, and fiscal 2022 weapons procurement (Air Force) funds in the amount of $500,000 will be obligated at the time of award, none of which will expire at the end of the current fiscal year. This contract was not competitively procured pursuant to Defense Federal Acquisition Regulation 6.302-1. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity (N0001922C0067).