Casemate 45 mm gun DOT-4

The picture shows the casemate 45 gun DOT-4 of 1939 model. The 45-mm tank gun 20-K is used, paired with 7.62 DS-39 or DT machine gun. Ball closure of the embrasure provides reliable protection against hits of 45-mm shells at ranges from 500 m/ Fire range of the gun is 3000 m, the sector of fire is 60 degrees.