The Lahti 20mm Anti-tank Gun: The ‘Finnish Boombeast
You’ve all seen the pictures of the bearded gun guy spooning a gigantic seven-foot long rifle deep in the woods (well, you have now). While we can’t give you an answer as to who the lucky lovebird is, we can identify the object of his affection as the Lahti L39 anti-tank gun. Some just call it the Finnish Boombeast and it’s real.
In the late 1930s, it was thought that any future war would involve the use of armored vehicles. But about that. The tanks and armored cars of say, 1938, were far from the M1 Abrams and M2 Bradleys of today. These early tanks, such as the German PzKpfw I and the Soviet T-26 were small slow tanks (under 20 mph top speeds) with thin armor that ran 6-15mm thick. It was thought that a group of tank hunters—a couple soldiers on foot armed with a very large rifle—could move around the battlefield and pick off these vehicles like big game hunters on safari. This led to such guns as the British Boys Anti-tank rifle, the German/Swiss Solothurn S-18, and others.
Finland in 1939 was on shaky ice with the Soviet Union, who at the time, shared a border with the small country. As the Soviets had no less than 18,000 tanks, the Finns felt the need to get their own locally made anti-tank rifle ricky tick.
Read the rest in my column at GUNS.com

Now thats a gun