A self-loading-pistol includes a slide slidably mounted on a frame and coupled to a recoil spring, with a support plate formed in a front portion of the slide. A barrel passes through the slide and is fixedly mounted on the frame. A slide lock mechanism locks the slide during firing of the pistol and is arranged in the front portion of the frame under the barrel. The slide lock mechanism includes a front seat formed on a front arm of a two-armed lever, a locking member mounted in the front seat, a rear seat formed on a rear arm of the two-armed lever, and a damping member mounted in the rear seat. The locking member and the damping member are pushed upwards to the front seat and the rear seat by a locking spring. A support surface is formed on the rear arm of the two-armed lever and extends to an aperture in the frame.