Policarpov 1-16
Source: youtube
It was also called the Snub-Nosed Soviet Fighter due to the blunt shape of its front. It was majorly used in the Spanish war. Most of them were destroyed when the Luftwaffe raid happened since they were not forewarned by the Russians. The Policarpov 1-16 were armed with sophisticated machine guns that gave it more firing power than the PV-1.