A gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall, consisting of a gold pommel issuing four gold swords saltirewise, hilts and pommel on a dark blue disc below a dark blue fleur-de-lis, all with a continuous red scroll arched across the top passing behind the upper blades doubled gold at the sides and passing over the blades in base, inscribed "EXCELLENCE" at the top and "ABOVE ALL" in base, all in gold letters.
Dark blue and scarlet are the colors traditionally associated with the Adjutant General's Corps. The fleur-de-lis refers to the unit's participation in the Rhineland Campaign during World War II. The disc signifies continuity, the sword is symbolic of authority, the saltire simulates a turnstile, and together they represent the supervised and controlled processing aspects of the unit's mission.
The distinctive unit insignia was originally approved for the 381st Replacement Battalion on 13 August 1971. It was redesignated for the 381st Personnel and Administration on 19 April 1972. The insignia was redesignated for the 381st Replacement Battalion, with description and symbolism revised on 22 October 1990.