Testing concluded that the mine was effective out to approximately , being capable of hitting 10% of the attacking force. At , this increased to 30%. The development project completed, the Aerojet team sent the project back to Picatinny. The Arsenal bid it out to various component suppliers. In 1960 it was type standardized as the M18A1. It was first used in Vietnam in the spring or early summer 1966.
Testing concluded that the mine was effective out to approximately , being capable of hitting 10% of the attacking force. At  this increased to 30%. The development project completed the Aerojet team sent the project back to Picatinny The Arsenal bid it out to various component suppliers. In 1960 it was type standardized as the M18A1. It was first used in Vietnam in the spring or early summer 1966.