Abstract: A muzzle member is mounted on the forward end of a gun barrel in such a way that a radial play-free mounting is effected which is secured against rotation and oscillations which occur at firing due to the finishing tolerances of the machined parts of the muzzle member.This object is achieved by constructing the front end of the gun barrel frusto-conically in front of an external threaded portion and constructing the rear inner portion of the muzzle member frusto-conically. An external threaded portion is provided on the gun barrel and an inner threaded bore portion is provided on the muzzle member for mating meshing mounting. The respective frusto-conical portions of the gun barrel and muzzle member have a length l.sub.1 is larger than 1.5 d.sub.1 thereby making for a radial play-free joint. The muzzle member is constructed in the longitudinal region l.sub.

Abstract: An improved arrangement for selectively transferring munitions shells from a pair of opposed feed sprockets to a movable breech block of an automatic weapon is described. A pair of displacement blocks are supported for vertical movement in mutually opposite directions in vertical planes disposed between the feed sprockets and forming upward extensions as a pair of shell-stripping projections on the moving breech. Shell-receiving seats are defined on each of the displacement blocks by a pair of superposed, normally parallel support elements and the intermediate portion of the block. A reversible pinion is drivingly connected to a pair of confronting tooth racks extending from the upper ends of the respective displacement blocks.