Abstract: A gun includes a gun barrel having a breech end; a wedge-type breechblock disposed at the breech end; a flash bore in the breechblock; a seal disposed adjacent to and surrounding an inlet opening of the flash bore; a firing mechanism mounted on the breechblock; a propellant igniter magazine removably receivable in the breechblock and including a housing and an endless guide channel defined in the housing; and a plurality of casings received in the guide channel. The casings are arranged in a side-by-side contacting relationship with one another; each casing having opposite open ends and a chamber for receiving a propellant igniter cartridge therein. There is further provided an advancing mechanism for step-wise advancing the casings in the endless guide channel for moving each casing into and out of a firing position in which a respective casing is in alignment with the flash bore and in engagement with the seal.

Abstract: A wedge-type breechblock arrangement for a gun having a breech-ring and being mounted on a gun cradle. The arrangement includes a breech wedge movable in the breech-ring transversely to the bore axis of the gun for opening and closing the breech end of the gun. A ramp is mounted on the cradle and a breech-opening shaft is connected with the breech wedge in the form-locking manner. A run-up lever is fixed to the breech-opening shaft and is in operative engagement with the ramp during an opening movement of the breech wedge. A holding device is provided for holding the breech wedge in an open position and for releasing the breech wedge to initiate movement to close the breech wedge. A blocking device is fixed to the cradle and includes a pivotally mounted blocking lever for pivoting into the path of movement of the run-up lever to block movement of the breech-opening shaft for limiting a first partial closing movement of the breech wedge.