ShieldOr, touching a base wavy Vert a tornado cloud Sable charged with a sword in pale surmounting in chief a pair of scales; all of the first.
CrestThat for the regiments and separate battalions of the Puerto Rico Army National Guard: From a wreath Or and Vert, 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.
MottoSEMPER LEX (Always The Law).
ShieldThe colors, green and yellow, are for the Military Police. The black cloud represents a tornado or waterspout, thus symbolizing the disaster from which the organization would assume its powers. The sword and scales are traditional symbols of law and justice; the sword, an English broadsword dating back to the time of the signing of the Magna Charta, represents the origin of our civil law. The wavy base is symbolic of the water surrounding the island in which the unit is located.
CrestThe crest is that of the Puerto Rico Army National Guard.
The coat of arms was originally approved for the 124th Military Police Battalion on 4 June 1952. It was cancelled on 5 July 1972. It was reinstated and redesignated for the 125th Military Police Battalion on 11 December 1996.