Hand firearm

A self-loading handgun with a barrel immovably secured to a frame, a firing pin, a slide guided linearly vis-à-vis the frame, and a breech which is held in a locked position on the frame in a forward position of the slide and which is moved from the locked position into an unlocked position upon a backward movement of the slide effected by a gas pressure from a fired projectile and moved together with the slide into a rear position from which the slide together with the breech is returned to the forward position under a spring force, wherein:

• the breech is of at least a two-part design comprising a breech locking mechanism with two lateral limbs and a breech face disposed between the limbs, wherein the breech locking mechanism on the limbs is provided with at least one protruding driving element which engages in a recess of the slide, and with at least one retaining cam engaging in a shoulder of the frame,
• the breech face and the breech locking mechanism are articulated together and the breech face incorporates an axial bore aligned with the barrel for the passage of the firing pin, and
• the breech face is coaxially guided to the barrel upon the backward movement and a forward movement of the slide.