1/300 Bereznyak-Isayev BI-1 x2

In the 1930's the Soviet Union had an intensive research program exploring the use of rockets for military use. Its most famous product was the Katyusha salvo rocket launcher (aka. the "Stalin Organ").

A less well known item was the BI-1 rocket fighter (first flight was in May 1942), which rivalled the German Messerschmitt Me 163 "Komet". However, only a small test series was built. In WWII, the Soviet Air force had more pressing needs than a point-defence interceptor against strategic bombers.

Wikipedia has more information about the original.

This item consists of two 1/300 scale aircraft models on a sprue