The Luger pistol (check your spelling) was originally made in 7.65 Luger- a bottlenecked cartridge. This later changed to 9MM Parabellum- commonly called 9mm Luger or 9x19. There was a subcaliber insert that could be used for training that fired a very small 4mm cartridge. Lugers have also been made in .22LR, .32 Auto, .380 auto and rarely, 45 auto.
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