The Department of Defense, specifically the U.S. Army Contracting Command-Redstone, is seeking information from potential sources for the procurement of two MCM5004 Manual Mass Comparators or equivalent models. These comparators are intended to replace aging equipment at the Army Physical Standards Labs located at Redstone Arsenal, Alabama, and must meet stringent specifications, including a maximum measurement capacity of 5 kg, readability of 0.1 mg, and repeatability of 0.5 mg or better, along with features such as internal calibration adjustments and rapid stabilization. This procurement is crucial for enhancing the Army's capabilities in precise mass measurements, thereby supporting ongoing mission requirements. Interested parties are encouraged to submit their responses by April 21, 2025, to the primary contact, Taylor Siskoff, at taylor.c.siskoff.civ@army.mil, or the secondary contact, Lisa Armes, at lisa.s.armes.civ@army.mil, while monitoring SAM.GOV for any future updates or solicitations.