Gas discharging device for e.g. machine gun barrel, has retainer, sealing section, recess and edge closing gas outlet opening and regulating gas pressure corresponding to barrel temperature in interior of gas cylinder

摘要

The device has a gas cylinder (13) connected with a barrel hole. The cylinder has a gas outlet opening connected with a retainer (25), sealing section, recess and edge. The cylinder and the retainer, sealing section, recess and the edge are arranged such that a temperature-operated changing of geometry of a barrel causes a relative movement between the cylinder and the retainer, sealing section, recess and edge. The retainer, sealing section, recess and edge concerning barrel components close the opening and regulate gas pressure corresponding to the temperature in an interior of the cylinder.