The Russian/Soviet AK-130 twin mount replaced the AK-100 single mount as the standard gun on Soviet ships in the 1980's. The twin mount fired a heavier round, had a high rate of fire, and took up less space than 2 100mm mounts. The twin AK-130 is equipped on the Sovremenny and Slava classes, on all the members of the Kirov class EXCEPT Kirov, and on the single Udaloy II completed, the Admiral Chabanenko.