 It consisted of two independent coupled weapons, each with its own barrel, firing mechanism, and separate 25-round magazine.As it was originally designed to be operated from airplanes, it had a high rate of fire of over 1,500 rounds per minute.However, in practice the 9mm munition was not sufficiently powerful to shoot down aircraft, which had become ever more resistant over the course of the war, and in addition the range was inadequate.