Abstract: The sear includes a first tang adapted to cooperate with the searing surface of the hammer. A second tang of the sear projects towards the firing pin. The firing pin has a sleeve like portion of an increased diameter defining an abutment surface. In the cocked position of the hammer the first tang of the sear contacts the searing surface of the hammer, and the end of the second tang is located in front of the abutment surface of the firing pin. Thus, when the gun is accidentally dropped, the firing pin cannot move for instance due to forces of intertia units own into the firing position striking unintentionally a loaded round.

Abstract: A rotatable shaft member supports a first control member and a second control member. The first control member cooperates with a tang of a rotatable sear. The second control member cooperates with an abutment stop of the sear. When the shaft is rotated to where the second control member contacts the abutment stop of the sear, the sear is blocked and the gun cannot be fired. When the shaft member is rotated such that the second control member is moved away from the tang of the sear, the gun can be fired. When the shaft member is rotated further such that the second control member is remote from the abutment stop and the first control member contacts the tang of the sear, the tang moves out of contact with the searing surface of the hammer. The hammer begins to pivot in a gun firing direction until the tang engages a half-cocked notch for stopping movement of the hammer, whereby the hammer is decocked.

Abstract: The gun can be switched to operate either in a double action or as single mode. A pin located in the slide can be rotated from a position, in which a jacket surface is flush with the bottom surface of the slide to a position where a nose projects above the bottom surface of the slide. The sear has a control cam which is acted upon by the nose of the pin when in its projecting state. The hammer includes a detent member having two abutment shoulder sections adapted to cooperate with a control edge of the sear. If the pin is in a position, in which mentioned jacket surface is flush with the bottom surface of the slide, it does not act upon the control cam of the sear such that upon the loading or a firing of the gun, the hammer is held in the fully cocked position, in that the first control edge of the sear engages the forward abutment shoulder section of the detent member. This is the single action mode.