A large caliber handgun that KBP Tula instrument manufacturing Design Bureau of Russia has announced at the exhibition of firearms that have been held in 2014, as is for handguns that 12.7x55mm is a large handgun that uses the unusual large caliber bullets.
In Tula Design Bureau to use the 12.7x55mm bullets are the same ammunition, a sniper rifle of the assault rifle of Bullpup "ASh-12.7" and Bullpup expression has developed the "VKS", RSh-12 is and this it was developed as a sequence weapons using the same ammunition, and is believed however, many unclear points for details.
From the fact that ASh-12 and VKS has been used as equipment of terror troops in Federal Security Service (FSB), has been developed as a handgun for backups that use the same ammunition, discussion with also, but this will also it is not known for more information.
In previous firearms exhibition in 2014, the overall shape is exhibited is that although different model detail very similar, even about whether what was published in 2014 is a production model of the final stage unknown is.
In RSh-12 is barrel is on the lower side of the rotary magazine (cylinder) "Under barrel" method of rotary magazine handgun (revolver), the barrel top to see the four of cooling holes (ventilated rib) oblong holes are is opened. Accessory mounting rail very similar to what is known as almost the same length as the total length of the barrel portion "Picatinny rail" is provided on the barrel top and bottom.
In Ammo Loaded 5 shots, according to a number that is published, the cylinder has a sharp deformation polygonal shape as cut surface of the apex of the prism rather than a cylindrical system. Cylinder in a manner to open toward the left side of the gun, revolver with the mechanism of the "under-barrel type" of this type is the normal revolver many of the cylinder in the opposite open upward, the RSh-12 cylinder is an expression open the same downward a normal revolver as far as to see the photos.
It is unclear because there is no detailed description of the hammer mechanism, but not a description of a a special mechanism.