A Gold color metal and enamel device 1 1/8 inches (2.86 cm) in height consisting of a shield blazoned: Per chevron Or and Gules, overall on a pale of the like between four fleurs-de-lis of the same, the silhouette of a corporal missile in flight Proper (White), stylized speed lines of the first. Attached below and to the sides of the shield a Gold scroll inscribed "NIHIL OBSTAT" in Red letters.
The colors scarlet and yellow are used for Artillery. The corporal missile in flight alludes to the battalion's past missile classification. The four fleurs-de-lis symbolize the unit's European battle honors for service during World War II. The motto translates to "Nothing Stands in Our Way."
The distinctive unit insignia was originally approved for the 557th Field Artillery Battalion on 1 November 1955. It was redesignated for the 557th US Army Artillery Group on 23 January 1967.