Aimo Johannes Lahti
(April 28, 1896,Viiala - April 19, 1970, Jyväskylä)
In 1922 - he started to design the Suomi M-31 SMG after examining the Bergmann MP18, which had many design problems as well as being expensive. The new design was revolutionary because the reliability, accuracy and the rate of fire were excellent. The first 200 Suomi SMGs were produced in 1922.