Description
On a yellow shield arched at top and bottom, 2 inches (5.08 cm) in width and 3 inches (7.62 cm) in height overall, a red diagonal stripe extending over the shield from upper left to lower right, bearing a yellow cannon barrel between in upper right a blue fleur-de-lis and in lower left three black cannon balls; all within a 1/8 inch (.32 cm) red border.

Symbolism
Scarlet and yellow are the colors used for Artillery. The diagonal red band, indicative of a road fraught with action and danger, bearing a gold cannon barrel for distinctive service, alludes to the unit's origin as Railroad Artillery and the fleur-de-lis refers to their WWI service in France. The cannon balls represent the three battalions of the regiment when first formed.

Background
The shoulder sleeve insignia was approved effective 16 September 1980. (TIOH Drawing Number A-1-658)