The AN/APQ-120 was an aircraft fire control radar (FCR) manufactured for the McDonnell Douglas F-4E Phantom II and it was manufactured by Westinghouse. AN/APQ-120 has a long line of lineage, with its origin traces all the way back to Aero-13 FCR developed by the same company in the early 1950s. A total of half a dozen FCRs were tested and evaluated on the first 18 F-4s built, but they were soon replaced by later radars produced in great numbers, including AN/APQ-120.