Self-propelled weapon "Condesator-2P" is a heavy system with mass of 64 tons, able to fire a 570 kg shell at the distance of 25,6 km. It was never serialy produced, only four units were made in total. It was first shown on Red Square of Moscow in 1957 and made a furore. Some foreign reporters supposed the machine was fake and was shown to create a threatening impression. But the system of 406 mm calibre was more than real.