On a vertical rectangular embroidered device arched at top and bottom divided diagonally from lower left to upper right, yellow and flag blue, a diagonally placed bayonet, point up, and evenly divided dark blue and yellow, between in upper left a dark blue pheon and in lower right a yellow pheon, points up; all within a 1/8 inch (.32 cm) dark blue border. Overall dimensions are 2 inches (5.08 cm) in width by 3 inches (7.62 cm) in length.
Flag blue is the color traditionally associated with Infantry units. The bayonet symbolizes close combat and the pheons denote combat readiness. The diagonal division suggests the military symbol for reconnaissance, combined with the three symbols signify the unit's lineage as the 3d Platoon, Reconnaissance Troop.
The shoulder sleeve insignia was approved on 5 February 2007. (TIOH Drawing Number A-1-914)