The U.S. Army Yuma Proving Ground is seeking sources for on-site calibration services for eight mass properties measurement instruments used on artillery and mortar ammunition, including annual preventative maintenance, repair, parts, labor, and travel. Performance will occur at Yuma Proving Ground, Yuma, Arizona. Calibration must be NIST-traceable and verify each system against original factory specifications. The government may set aside the eventual competitive procurement for small businesses, and interested parties must demonstrate relevant experience and capabilities. This is a market research notice only and does not constitute a solicitation or commitment to award a contract.