Shield
Gules, on a canton Or a saltire Azure between in fess a giant cactus Proper and a fleur-de-lis of the first.
Crest
That for the regiments and separate battalions of the New Hampshire Army National Guard: On a wreath of the colors Or and Gules two pine branches saltirewise Proper crossed behind a bundle of five arrows palewise Argent bound together by a ribbon Gules, the ends entwining the branches.
Motto
LOAD WITH CANISTER.
Shield
The shield is red for Artillery. The blue saltire represents Civil War service; the giant cactus, Mexican Border service; and the fleur-de-lis, World War I service, these symbols being placed on a canton to indicate the duty was performed by Battery A, the nucleus of the 172d Field Artillery.
Crest
The crest is that of the New Hampshire Army National Guard.
The coat of arms was originally approved for the 172d Field Artillery Regiment on 5 August 1936. It was redesignated for the 172d Field Artillery Battalion on 30 August 1943. It was redesignated for the 172d Artillery Regiment on 30 March 1961. The insignia was redesignated for the 172d Field Artillery Regiment on 19 July 1972.