High torque long motor type of weapons M16/M4/XM177/MP5/G3/P90 from Systema. It's the latest model, which completely replaces the highly successful predecessor Magnum and Turbo. The motor uses high efficiency neodymium magnets, which provide high speed and high torque of motor. The motors are wound by hand, have a lower internal electrical resistance and mechanical friction. AZ motors are suitable for all types of springs.