The Department of Defense, through the Naval Surface Warfare Center (NSWC) Indian Head Division, is seeking to issue a Cost Plus Fixed Fee (CPFF) Order under Basic Ordering Agreement N00174-23-G-0001 for modernization, preservation, and corrosion control services related to MK 38 Machine Gun Systems (MGSs). The procurement includes labor, materials, and services for shipboard testing, equipment removal and installation, as well as fleet support, technical assistance, and training. BAE Systems Land & Armaments L.P. is the sole source identified for this contract due to its unique technical qualifications and facilities necessary to meet the government's requirements within the specified timeframe. Interested parties can direct inquiries to Ivy Sasaki at ivy.h.sasaki.civ@us.navy.mil, as this opportunity is intended for a single-source negotiation under FAR 6.302.