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Suomi KP/31 in its most common configuration with its 71-round drum magazine

The Suomi KP/-31 (Suomi-konepistooli or "Finland-submachine gun"), also known as the Suomi m/31, was a Finnish straight blowback operated submachine gun designed by Aimo Lahti in 1922. It was adopted by the Finnish Defence Forces after entering production in 1931, and saw service during the Winter War, Continuation War and Lapland War between the years 1939 and 1945.

Battlefield VEdit

"The KP/-31 was possibly the best submachine gun of World War II. It had great accuracy and a high rate of fire. The Russians copied the design, but their version never reached the same high standard."

— In-game description

The Suomi KP/-31 is a submachine gun featured in Battlefield V. It was first revealed on the official screenshot published alongside the Battlefield 5 Official Gamescom Trailer Teaser. It is the first unlock for the Medic at class rank 1.

The Suomi has the highest fire rate of submachine guns, outperforming the similar M1928, of which it shares an identical upgrade tree, for greatest damage output and the quickest time to kill in its category but with a small default magazine size of 20 rounds and poor recoil control. 

These drawbacks can be corrected somewhat through specialisations, with both paths improving controllability and responsiveness in various ways. Of note is the rank 3 choice between Light Bolt which boosts fire rate to 981 RPM, and Extended Magazine granting 50 rounds per mag but also lengthening time to complete each reload.