What does the rank insignia for a first sergeant consist of?

The rank insignia for a first sergeant indeed consists of three chevrons above three arcs, with a pierced lozenge in between. This distinctive design is specifically used to denote the rank of first sergeant in the U.S. Army, making it easily recognizable. The three chevrons indicate the non-commissioned officer’s rank and experience, while the three arcs signify the leadership and responsibility that comes with the position. The pierced lozenge, which symbolizes greater responsibility within the unit, differentiates the first sergeant from other ranks, such as sergeants and staff sergeants. This unique combination of elements is what establishes the identity and authority of a first sergeant in the Army's hierarchy.