The Colt Python 4″ 357 CO2 Revolver Airsoft Gun Licensed by Cybergun is constructed fully out of metal and rubberized plastic. Powered by a single Co2 12g cartridge this gun utilizes six metal shells to function. Each shell holds one BB, which helps the revolver stay true to it’s real counterpart. Since the revolver is non-blow back there is no gas being used to move parts, therefore all the gun’s efforts is concentrated at propelling the BB. Fully adjustable rear sights allow you to be as accurate as possible. Fully trademarked by the venerable Colt Firearms Company, this revolver is one of the most solidly constructed on the airsoft market.