Abstract: An apparatus for producing rifling grooves in a weapon barrel, in which a drawing head (1) that rotates about its longitudinal axis (5) is drawn through the respective weapon barrel by a drawing rod (2), and the rifling grooves are cut into the inside surface of the weapon barrel with corresponding drawing knives (9) disposed on the drawing head (1). To produce the rifling grooves in the respective weapon barrel at a Low cost, the drawing head (1) is provided with a central adjusting arbor (6), with which all of the drawing knives (9) can be simultaneously displaced outwardly. In the production of the rifling grooves, therefore, the drawing knives (9) need no longer be exchanged in a time-consuming process. Instead, only the setting of the drawing knives (9) is modified with the aid of the adjusting arbor (6).

Abstract: An apparatus for hardening the inside contour of a gun barrel (1) with laser radiation, which apparatus includes a laser, a laser head (10) that can be disposed to be displaced along the bore axis (4) of the gun barrel (1), and beam-deflecting optics (17) disposed in the laser head so that the laser radiation can be coupled into the muzzle of the gun barrel (1) and guided perpendicularly to the inside surface (5) of the gun barrel (1) by the beam-deflecting optics (17). To harden the gun barrel (1) with high precision and homogeneity, and make available a processing space that is relatively large in comparison to known apparatuses, an ND:YAG laser is used as the laser, and, due to the shorter wavelength in comparison to CO.sub.2 lasers, a glass or optical fiber (11) is used for transmitting the laser beam to the laser head. Moreover, the laser head (10) is secured to a drawing rod (3) that can be centered within the gun barrel (1) and displaced in the direction of the bore axis (4) of the gun barrel (1).