General Dynamics Mission Systems, Scottsdale, Arizona, is awarded a $49,889,282 contract modification under an existing sole-source, indefinite-quantity, indefinite-delivery production contract (N00039-18-D-0002) for the continued procurement, manufacturing, testing and delivery of AN/USC-61(C) Digital Modular Radio (DMR) systems, High Frequency Distribution Amplifier Group (HFDAG) components and engineering services. DMR is a modular, software reprogrammable radio system with embedded cryptography that provides all radio frequency (RF) to-baseband and baseband-to-RF conversion functions required for United States naval line-of-sight, beyond line-of-sight and satellite communications systems. This action will allow for the execution of emergent requirements that were not anticipated at the onset of the contract. Specifically, this action will allow the government to continue procuring hardware and services that fill an unanticipated need, within the scope of the contract but exceeding the originally estimated quantities. The proposed contract action will increase the ceiling values of existing firm-fixed-price and cost-plus-fixed-fee line items by $49,889,282, increasing the current contract value from $186,087,426 to $235,976,708. Contract actions will be issued and funds obligated as individual delivery orders. Shipbuilding and conversion, Navy; and other procurement, Navy funds will be placed on contract with a production delivery order issued after award of the contract modification. Work will be performed in Scottsdale, Arizona, and is expected to be completed in December 2022. This is a sole source acquisition subject to 10 U.S. Code 2304(c)(1) — one source or limited sources. The Naval Information Warfare Systems Command, San Diego, California, awarded the contract action on behalf of the Navy’s Program Executive Office for Command, Control, Communication, Computers and Intelligence.