Pistol accessory, pistol and use of the pistol

Pistol accessory with a connecting mechanism for connecting the pistol accessory to a pistol (1), which comprises a grip section (2), a barrel (3) and a slide (4) which is slidable relative to the grip section (2) and to the barrel (3), extends along a longitudinal axis and has two side walls (4a) and an upper cover section (4b) connecting the side walls (4a) at the top, as well as an ejection window (4c) for ejecting cartridge cases, wherein the pistol accessory comprises an actuating member (5) which can be fastened to the rear end of the slide (4) of a pistol (1), characterized in that the actuating member (5), in the state arranged on the slide (4), has a gripping access (5a) which is accessible from below through a lower access plane and into which a person using the pistol (1) can engage from below with a finger relative to the upper cover section (4b) of the slide (4).