Complex sentence: Designated kpist m/37 (9mm Browning Long caliber) after the year of adaption, in 1939 Sweden decided to switch to 9 mm Parabellum and the new weapons were designated kpist m/37-39.
Split into simpler sentences: Designated kpist m/37 (9mm Browning Long caliber) after the year of adaption. In 1939 Sweden decided to switch to 9 mm Parabellum and the new weapons were designated kpist m/37-39.