Northrop Grumman Corp., Plymouth, Minnesota, is awarded a firm-fixed price, indefinite-delivery/indefinite-quantity contract with a maximum ceiling of $81,031,456 for the delivery of up to 300 XM914E1 30mm x 113mm chain guns, spares, training, and associated engineering services in support of the Program Manager Ground-Based Air Defense — Marine Air Defense Integrated System Increment 1 program. All work will be performed in Mesa, Arizona, with an estimated completion date of May 31, 2026. Fiscal 2020 procurement (Marine Corps) funds in the amount of $6,787,066 will be obligated at the time of award and funds will not expire this fiscal year. This contract was not competitively procured in accordance with Federal Acquisition Regulation 6.302-1 – only one responsible source and no other supplies or services will satisfy agency requirements. The Marine Corps Systems Command, Quantico, Virginia, is the contracting activity (M67854-21-D-0055).