Mateba Model 6 Unica (regularly referred to just as the Mateba or the Mateba Autorevolver) is a semi auto gun, one of just a couple of this model ever created. So we can safely say this is a unique gun. It was produced by Mateba, situated in Pavia, Italy. The Mateba Model 6 utilizes the force from discharging to pivot the barrel and cockerel the hammer, not at all like traditional pistols, which rely on upon the client physically pulling the trigger to incite the weapon’s component of operation.The Mateba Autorevolver’s barrel arrangement is unique in relation to most different pistols. The barrel is adjusted to the base of the chamber rather than the top.