In 1963, after rejecting a deal of MiG-19s in search for a new frontline fighter, Finland became the first country outside the Warsaw Pact to purchase the MiG-21, starting with MiG-21F-13s and building their long and prosperous relationship in purchasing Soviet aircraft. Their long service of the Fishbed would culminate in 1977, when Finland acquired 26 examples of the MiG-21bis airframe, specifically the Fishbed-N variant with the Polyot-OI guidance system instead of the Lazur system. These aircraft would remain in Finnish service until 1998, when they were replaced by the F/A-18C Hornet after the end of the Cold War.

The MiG-21bis (Sweden) (NATO Code: Fishbed-N) was introduced in Update "Fire and Ice". This aircraft is completely identical to the MiG-21bis found in the Soviet tech tree, and as such, plays exactly the same. The only differences are cosmetic, such as the camouflage and the names used on its missiles (i.e it has the export R-60MK instead of the R-60M, which is the exact same missile with a different name). The same tips and cautions should be exercised when flying this aircraft; chief of which being the incredible AoA/instantaneous turn and engine acceleration power to utilize, while being cautious of the weak energy retention and subpar missiles compared to many of your adversaries at this battle rating.