Azure a pale Or and per chevron embattled Gules, in chief a millrind Vert and in base a fountain.
That for the regiments and separate battalions of the Puerto Rico Army National Guard: On a wreath of the colors Or and Azure, upon a closed book Gules with pages edged Or a paschal lamb couchant with staff and banner of San Juan (Gules a cross Argent) all Proper.
WE ARE PROUD TO SUPPORT.
The embattled chevron (red) simulating a fortress, symbolizes the historic El Morro fortress built in 1584 by the Spaniards for the protection of the City of San Juan. The heraldic fountain, a symbol for water, refers to the waves and water of the San Juan Bay. The millrind, an iron reinforcement fixed in the center of a millstone to support the stone as it revolves on its axis when grinding wheat, is used in heraldry as a symbol of support. The color green alludes to the island as a country of eternal spring and to its tropical vegetation.
The crest is that of the Puerto Rico Army National Guard.
The coat of arms was approved on 9 December 1969.