The anti-tank rifle is largely absent from modern combat because today's tanks have advanced armor that can shrug off many tank rounds, let alone rifle rounds. But that wasn't always the case.
Anti-tank rifles wreaked havoc on World War I tanks, and most World War II tanks had at least a few weak spots where a good anti-tank rifle could end the fight.
YouTube channel FullMag decided to see what one of these awesome weapons would do to a series of 1/4-inch thick steel plates — and the result is pretty great.
The shooter was using a 20mm anti-tank rifle with its original tungsten ammo. One of the best things about the video is that you can see what made an anti-tank rifle so dangerous for the crew.
When the 20mm round punches past the first few plates, it doesn't just pass harmlessly through. Instead, shards of metal split off and turn white-hot thanks to the kinetic energy in the round changing to heat.
For the crew inside the tank, the white-hot slivers of metal and larger chunks of steel would be lethal, potentially getting rid of the crew even if none of them were hit by the round itself.
These awesome weapons saved the day for the Allies in a few battles, including Pavlov's House in the Battle of Stalingrad, where a platoon of Soviet troops held off a Nazi siege for approximately two months thanks to their skillful use of an anti-tank rifle.
See FullMag's entire video in the embed below. You can skip to 4:15 to just watch the shot and the effect on the steel plates: