This paepr model is a SD Typhoon class Submarine (Project 941 or Akula), a type of nuclear-powered ballistic missile submarine deployed by the Soviet Navy in the 1980s, the papercraft was created by Break Even, and the finished model is about 13 cm long. There is also another Typhoon Class Submarine paper model at Papercraft Square: Typhoon Class Submarine Red October Free Paper Model.
With a submerged displacement of 48,000 tons, the Typhoons are the largest class of submarine ever built, large enough to accommodate decent living facilities for the crew when submerged for months on end. The source of the NATO reporting name remains unclear, although it is often claimed to be related to the use of the word "typhoon" by Leonid Brezhnev in a 1974 speech while describing a new type of nuclear ballistic missile submarine.
Soviet doctrine for these vessels was to patrol under the Arctic ice cap and surface to launch SLBMs, avoiding the need to transit the GIUK gap and remaining safe from the enemy attack submarines and anti-submarine forces. Technically, Typhoons were also able to deploy their long-range nuclear missiles while moored at their docks. The Russian Navy canceled its Typhoon modernization program in March 2012, stating that modernizing one Typhoon would be as expensive as building two new Borei-class submarines. With the announcement that Russia has eliminated the last SS-N-20 Sturgeon SLBMs in September 2012, the remaining Typhoons have reached the end of service. [Source: wiki]
You can download the papercraft model here: SD Typhoon Class Nuclear-powered Ballistic Missile Submarine Free Paper Model Download