The AirWolf MCT is based on the Air Ranger but features the newest CDT-D electronic technology - this electronically controls the expellation of compressed air from the cylinder to the transfer port. This upgraded technology features the very latest lean charge refinements, giving you more shots, an even quieter gun and more energy potential for FAC-rated rifles. This latest technology is also responsible for the Air Wolf having the quickest locktime on any airgun ever! 400 or 500cc Bottles