The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure a specialized glass head combiner, identified by NSN 7R-6650-016876828-KB, with a quantity of five units required for delivery FOB origin. This procurement is critical as the item is flight critical and must be sourced from approved suppliers due to the lack of available technical data or rights for alternative sources, necessitating government source approval prior to contract award. Interested vendors must submit their proposals along with the required source approval documentation within 45 days of this presolicitation notice, and can contact Chad M. Fichter at (215) 697-2782 or via email at CHAD.FICHTER@NAVY.MIL for further information.