The description refers to a rifle with a shell (2) to be inserted into a shaft (1), to which shell (2) a barrel (3) can be connected, and with a mounting rail (5) fixed to the barrel (3) for accommodating an aiming telescope (17) projecting backward beyond the barrel (3). To achieve favorable construction. features, it is suggested that the mounting rail (5) for accommodating the aiming telescope (17) engages into a shell guide (6).
