 The barrel was reduced in length to 4 inches (102mm), and the caliber was 9x19mm Parabellum, and the 9x19mm DWM cartridge (Catalog No.278F) initially adopted by the German Army featured a 123-grain truncated-nose bullet design intended to increase wounding effect of the fully jacketed bullet.With slight modifications, notably the addition of a stock mounting lug and a hold-open latch, the P08 would serve as the German Army's principal sidearm during World War I, augmented by Mauser C96 and Model 1914 pistols.