M1921 "Bolo" Mauser

From Wikipedia: Mauser began manufacturing a compliant version of the C96 for commercial sale from 1920 to 1921. It featured smaller grips, a shorter 99-millimetre (3.9 in) barrel, and was chambered for the standard 7.63×25mm Mauser. Mass-production of the Bolo Mauser was from 1921 to 1930. It was sold in quantity to armies in the contested Baltic region and was carried by the Poles, Lithuanians, German Freikorps and White Russians. The Bolshevik government (and later the new Red Army) of the embryonic Soviet Union purchased large numbers of this model in the 1920s and also appropriated them from defeated enemies. The distinctive pistol became associated with the Bolsheviks and was thus nicknamed the "Bolo". The "Bolo" model was also popular elsewhere, as the shorter barrel and smaller overall size made the gun easier to conceal.