100 56 TK or 100 TK ("100 mm, 56 length caliber, turret gun") is a Finnish stationary coastal artillery gun that utilizes the tank turret from the Soviet T-55 tank with its 100 mm D-10 tank gun. 100 56 TK is the main (light) weapon of the Finnish coastal artillery and complements the medium gun 130 TK in the coastal artillery role.
Read more about 100 56 TK: Background, Design, Operation and Modifications, Decommissioning