The U.S. Army Contracting Command - Aberdeen Proving Ground (ACC-APG) intends to procure three (3) multiple scientific laser systems and four (4) replacement constituent components for atomic spectroscopy applications in quantum technologies. The Product Service Code (PSC) for this requirement is 6640 (Laboratory Equipment and Supplies), and the NAICS code is 334516 (Analytical Laboratory Instrument Manufacturing). This is a combined synopsis/solicitation for commercial items prepared in accordance with the format in Federal Acquisition Regulation (FAR) Subpart 12.6, as supplemented with additional information included in this notice. This announcement constitutes the only solicitation; proposals are being requested and a written solicitation will not be issued. This acquisition is being conducted as a sole source procurement under the authority of FAR 6.302-1, "Only one responsible source and no other supplies or services will satisfy agency requirements." The government has determined that Toptica Photonics is the only responsible source capable of providing the required items. Please refer to the solicitation attachments for further details.