Picture showing the magazine of a Bofors 57 mm automatic gun L/50. The magazine is a Bofors construction and consists of a seemingly integrated drum magazine. The magazine is open and lacks a cartridge row like a conventional magazine. Instead, the magazine has cartridge compartments with loose cartridges. When a compartment ends up in position for feeding the weapon, the compartment's row of cartridges fall down into the weapon via gravity.
Bofors
Flyghistorisk revy 31, Saab 18