Complex sentence: The Destroyer Carbine is a small bolt action carbine (usually) chambered for the 9 x 23 mm Bergman-Bayard cartridge, more commonly known as 9 x 23 mm Largo, and used by the Spanish Guardia Civil from the mid 1930s until the late 1960s.
Split into simpler sentences: The Destroyer Carbine is a small bolt action carbine (usually) chambered for the 9 x 23 mm Bergman-Bayard cartridge (more commonly known as 9 x 23 mm Largo). The carbine was used by the Spanish Guardia Civil from the mid 1930s until the late 1960s.