In the late 1930s and the 1940s the Winter War and the Continuation War also affected Vammalan Konepaja's activities. The company had been trading for twenty years when, on the eve of the Winter War, the armoury was moved from the capital to Vammala. Weapons workshop 1 took up residence in Vammalan Konepaja's premises on 3.11.1939. At first, the armoury's role was to prepare M91 rifles and to fix M09 machine guns. Later, the armoury worked with Vammalan Konepaja to make parts for machine gun locks and pistols. It has been estimated that around half the artillery shells fired during the last wars were made in the Vammala armoury. After the wars Konepaja took part in war reparations by manufacturing a variety of machine parts. It was also around this time, in 1943, that the company became a limited company.