Shield
Gules, beneath a kittiwake Volant Proper a kris fesswise Argent, in base a pile reversed barry wavy of the second and Azure, thereon a Bronze bell also Proper.
Crest
On a wreath of the colors Or and Gules, between six golps in fess a Bronze howitzer bore upward issuing a pheon reversed Sable enflamed Proper and charged with an escallop Argent.
Motto
IN PERICULO NOS JUBETE (When in Danger, Command Us).
Shield
Scarlet is the color used for Field Artillery. The kittiwake, a gull associated with the Aleutians, and the kris, representative of the Pacific Islands, are symbolic of service during World War II. The bronze bell connotes service in Korea. The blue and white wavy bars are indicative of the organization's amphibious operations.
Crest
The howitzer symbolizes Field Artillery. The enflamed pheon, alluding to the quadrant, an instrument for measuring altitude, refers to the hills of Korea and the intensive devastating and accurate fire laid down during March 1953. The six grapeshots symbolize the six more famous engagements in which the organization participated during the Korean War. The escallop or seashell refers to the Pacific area and the organization's service in World War II.
The coat of arms was originally approved for the 31st Field Artillery Battalion on 29 December 1951. It was amended to rescind the motto "IN PERICULO, NOBIS MITTETE" (When in Danger, Send for Us) and add the motto "IN PERICULO, NOS JUBETE" (When in Danger, Command Us) on 4 May 1953. The insignia was redesignated for the 31st Artillery Regiment on 13 March 1958. It was amended to remove the punctuation from the motto on 28 July 1958. It was amended to add a crest on 24 November 1964. The insignia was redesignated for the 31st Field Artillery Regiment on 1 September 1971. It was amended to correct the blazon of the shield and crest on 1 August 2006.