The 100-mm (3.9-in) gun was followed in the mid-1970s by a brand new gun design mounted initially on the 'Sovremenny' destroyer class, and found to be a 70-calibre twin 130-mm dual-purpose gun mount. The barrels are also water-cooled to prolong life. The fitting of the barrels close together would seem to indicate that they share a common cradle system. The guns have a greater maximum range than the older 152-mm (6-in) Soviet guns (28km/17.4 miles in comparison with 27km/16.8 miles), and are now fitted as the main armament for the larger

Soviet surface combatants such as the 'Slava' class missile cruisers and the second nuclear-powered battlecruiser, the Frunze. Fire-control is similar to that of the smaller 100-mm gun.

Specification 130-mm L/70

Calibre: 130 mm (5.12 in) No. of barrels: two Elevation: -5° to +80°

Muzzle velocity: 950 m (3, 117 ft) per second

Maximum rate of fire: 130 rpm Maximum effective ranges: surface fire 18 km ( 11.2 miles), and anti-aircraft fire 10 km (6.2 miles)