1. Field of the Invention
This invention relates to a breech closure for a barrel-type firearm, in which a flow passage for conducting an igniting jet from an igniting cartridge held in a magezine extends through a breechblock.
2. Description of the Prior Art
To permit a gun to be fired after it has been loaded, an igniting cartridge must be inserted into the breech closure and a propellant charge for the projectile which has been loaded must be fired by an igniting jet, which is generated by the igniting cartridge and passes in a flow passage through the breechblock. Such igniting cartridges are usually inserted into the breech closure by hand because if a magazine is provided which is suitable for that purpose and in which the igniting cartridges are held it will be rather difficult to gastightly connect the magazine holding the igniting cartridges to the flow passage of the breechblock. In that case it must be taken into account that a gastightness in a very wide pressure range, e.g., between 100 and 4000 bars, must be ensured and that measures which may be adopted to seal against high pressures may sometimes be inconsistent with measures which will be required to seal against low pressures.