The 20 ItK 40 VKT or 20 mm dual anti-aircraft cannon model 1940 manufactured by VKT was a Finnish light anti-aircraft gun designed by the Finnish gunsmith Aimo Lahti.

[1][2] The 20 ItK 40 VKT is a dual anti-aircraft gun designed by Aimo Lahti.

[1][2] Unlike the L-39 anti-tank rifle, weapons in the 20 ItK 40 VKT are designed for full-automatic fire and so do not suffer from the similar structural weaknesses as the full-automatic conversion L-39/44 anti-aircraft rifles.

The gun trailer was also problematic, as it was rather frail and offered a ground clearance of only 20 cm.

At the end of the war the 20 ItK 40 VKT was the most numerous field army 20 mm anti-aircraft gun (the 20 mm Madsen was more numerous, but used primarily by navy and coastal artillery or at the home front).