The 2A3 Kondensator 2P (Russian: 2А3 «Конденсатор» – "Condenser" or "Capacitor") was a Soviet 406 mm self-propelled howitzer.

The Soviet Union started its own program to develop a 406mm self-propelled howitzer capable of firing nuclear projectiles, codenamed Objekt 271.

The unified system received the military industrial designation 2A3 and was completed in 1956 at the Kirov Works in Leningrad.

There they remained in service until the military reforms of Nikita Khrushchev were enacted, favoring more effective missile systems over the super-heavy artillery and heavy tanks of the Stalinist era.

[3] In the mid-1960s, all four Kondensator howitzers were officially retired, with one of these formidable weapons finding a lasting place on a static display at the Central Armed Forces Museum in Moscow.