This Sources Sought announcement is to assist the United States Marine Corps (USMC), Marine Corps Systems Command (MCSC), Program Manager Combat Support Systems (PM CSS), Product Manager Combat Servic... This Sources Sought announcement is to assist the United States Marine Corps (USMC), Marine Corps Systems Command (MCSC), Program Manager Combat Support Systems (PM CSS), Product Manager Combat Service Support Equipment (PdM CSSE) to identify potential vendors capable of developing a Multispectral Camouflage Overgarment (MCO) to meet USMC requirements.