Today we are looking at a unique military trials Steyr-Hahn M1911 pistol which has been fitted with an adjustable tangent rear sight. The standard model of the Steyr-Hahn has a fixed rear notch, but it seems that a potential client requested (or Steyr anticipated that someone would request) and adjustable sight model along with a detachable shoulder stock/holster. So they took one of the first batch of commercial production guns and modified it for aimed ("aimed") fire out to 1800 meter. The stock was relieved to match the new sights as well. Ultimately, of course, this pattern was not adopted by anyone, and this is the only known example of such a configuration.