The Lahti anti-tank rifle looks a little unusual, showing a pair of skis on the front. But then again, it does come from Finland.
According to Modernfirearms.net, the Lahti L-39, also known as the Norsupyssy — or "elephant gun" — fired a 20x138mm round and had a 10-shot clip. While not effective against the most modern tanks, like the Russian T-34, the rifle proved to be useful against bunkers and other material targets. One variant was a full-auto version used as an anti-aircraft gun.
Lahti L-39 anti-tank rifle. (Photo from Wikimedia Commons)
Don't laugh. According to the 25th Infantry Division Association's website, American personnel used the Browning Automatic Rifle — or BAR — against the Japanese planes during the attack on Pearl Harbor.
This semi-auto rifle was kept in Finnish military stocks until the 1980s, when many were scrapped. This makes the M107 Barrett used by the United States military look like a mousegun.
A number of these rifles, though, were declared surplus and sold in the United States in the early 1960s. The Gun Control Act of 1968, though, placed these rifles under some very heavy controls — even though none were ever used in crimes.
A Lahti L-39 anti-tank rifle used during World War II. (Photo from Wikimedia Commons)
In this video, the punch this rifle packed is very apparent. The people who set up the test put up 16 quarter-inch steel plates. You can see what that shell does to the plates in this GIF.
For a real in-depth look at this awesome gun — and the way they set up this firepower demonstration — look at the whole video below: