Sable, an arrowhead surmounting the apex of three arrow shafts Or; the shafts enflamed Gules.
From a wreath Or and Sable, an oriental dragon statant regardant to dexter of the first, overall a spear between two radiating bamboo spears Proper supporting a pellet fimbriated Argent charged with a fleur-de-lis of the first.
FIREPOWER FOR LANDPOWER
The three arrows are symbols of conventional and special ammunition and guided missile support companies over which the Ordnance Battalion provides command and administrative, tactical and technical supervision. The flame alludes to the Ordnance Corps' bomb symbol and further refers to the unit's World War II service in Normandy and Northern France. Black refers to ammunition and the color of the explosive mixture of gunpowder.
The oriental dragon represents the unit's campaign participation credits in Vietnam. The two bamboo spears honor the two decorations earned in Vietnam and the spear, for the Army Superior Unit Award earned in 1990-1991. The black sphere is adapted from the Ordnance bomb symbol and the white edge or ring highlights unity and teamwork. The fleur-de-lis honors the organization's war service in Normandy and Northern France.
The coat of arms was originally approved for the 191st Ordnance Battalion on 25 May 2001. It was redesignated effective 16 September 2007, for the 391st Support Battalion.