Gules, three Indian arrows, one in pale and two in saltire Or, overall a circular buckskin shield of the second, bearing a sunburst of the like, issuing sixteen rays Argent, tipped Sable, charged in the center with a Korean Taeguk (Scarlet at top, Blue at base) surmounted by a Gold fleur-de-lis.
That for the regiments and separate battalions of the Oklahoma Army National Guard: On a wreath Or and Gules an Indian's head with war bonnet all Proper.
EYES OF THE ARTILLERY.
The three arrows symbolize the unit's three assault landings at Sicily, Naples-Foggia and Southern France. The arrows with the buckskin shield also symbolize Oklahoma's Indian heritage, a depiction of a buckskin shield is found on the State Flag of Oklahoma. The sunburst design, a favorite Indian symbol, alludes to the unit's mission to provide general target acquisition, survey and meteorological support to the artillery with a corps. The sixteen stylized rays symbolize the sixteen battle honors of some elements of the organization, the fleur-de-lis represents the unit's service in Europe, World War II, and the Taeguk alludes to the organization's participation in the Korean War.
The crest is that of the Oklahoma Army National Guard.
The coat of arms was originally approved for the 171st Artillery Regiment on 26 November 1971. It was redesignated for the 171st Field Artillery Regiment on 30 May 1972.