The Italian made "Mateba Model 6 Unica" does NOT eject spent cartridges, the cylinder swings out like any other revolver. It is currently the only automatic revolver made in the world today. The Webley-Fosbery was also made, but has been out of production for more than sixty years.
[img]http://www.kitsune.addr.com/Firearms/Revolvers/Mateba_Model_6.jpg[/img]
The Unica functions as follows: The first triggerpull is a normal double action pull, it cocks the hammer, and then releases it, firing the gun. Upon firing the upper part of the frame recoils. This movement then cocks the hammer, and automatically rotates the cylinder. When the upper frame has completely recoiled, it is pushed forward again by a spring. When it has returned to its forward position the gun is ready to fire another shot, only this time a light pull in Single-Action mode, as the hammer is already cocked and the cylinder rotated.
Thanks, but no thanks.