the cartridge chamber or the barrel as a whole being tiltable between a loading and a firing position

Full Title

Feeding or loading of ammunition ( ; adaptations for feeding or loading missiles from magazines in air guns F41B11/50); Magazines; Guiding means for the extracting of cartridges (cartridge extractors or ejectors F41A15/00) > Loading arrangements, i.e. for bringing the ammunition into the firing position > the cartridge chamber or the barrel as a whole being tiltable between a loading and a firing position