The Naval Research Laboratory intends to award a firm-fixed-price purchase order to CPI Satcom & Antenna Technologies Inc. for one Model 990 Antenna Control System (ACS) with associated equipment and installation, to be performed at the contractor's facility in Plano, Texas. The ACS must be compatible with the facility's existing twin AN/FSC-78 ACS hardware and software network architecture. This is a sole source notice, not a request for competitive proposals, but interested parties may submit capability statements for consideration. Submissions must include business identification details, size status, CAGE/UEID numbers, a five-page capabilities statement, and an analysis of how the firm would overcome the sole source barriers.