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Underwater gunfights are an especially rare kind of combat. Underwater rifles, built specifically to launch a projectile through dense water, are one way to arm a submarine soldier, but they present a separate problem: underwater rifles are ineffective above the surface, and a person hoping to fight on land will need to carry a second gun.

To help solve this unique problem, Russia has developed specialized dual-use underwater and above-water rifles. The latest of these is the “dual-medium ADS assault rifle” created by High-Precision Weapons Company, part of Russian defense giant Rostec. 

With a magazine located behind the trigger and handle (the “bullpup”) configuration, the rifle is compact. Its barrel is fitted for 5.45x39mm bullets, the same kind commonly found in the AK-74 rifle and in use across the world today. In addition, the ADS can load a cartridge of special 5.45×39 mm bullets designed to fire entirely underwater.

It’s a close-range tool designed to absolutely stop a person or animal near the diver, according to popsci.com. 

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