A barreled weapon including a forward barrel segment which is tiltable about a trunnion through the intermediary of an actuating arrangement, and additionally includes a rear barrel segment which is similarly pivotable about the trunnion whereby the barrel segments, when oriented in their coaxial position, are sealed through the utilization of a sealing ring at a joint or separating location without necessitating any axial displacement of one of the barrel segments. The weapon includes a casing which is conducted along a screwthread and wherein, in the coaxial position of the barrel segments, the actuating arrangement rotates the casing so as to cause the latter, in conjunction with the sealing ring which is arranged thereon, to axially slide over the separating location between the barrel segments.