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The bullets, manufactured by DSG Technologies, are tipped with tungsten and create an gas bubble to allow the bullet to move rapidly through the water. Ordinary bullets don't have this supercavitating effect, which means they move much more slowly through water.
While ordinary bullets can travel about half a mile per minute, that speed quickly slows to a complete stop when the bullet travels through denser materials like water.
According to DSG Technologies, "Depending on the weapon and the used loading variant, this ammunition is suitable for use in partial or fully submerged weapons, regardless of if the target is in water or on the surface."
A press officer with US Special Operations Command told Insider that the bullets were being tested by the Office of the Secretary of Defense's Combating Terrorism Technical Support Office (CTTSO). CTTSO confirmed to Insider that it is testing supercavitating ammunition, but declined to answer questions about whether special operations forces have been involved in the testing, or whether DSG Technologies is the company that provides the ammunition for testing.
DSG told Defense News that its ammunition is undergoing several tests with the military, including tests in which the bullets are fired from underwater up to the surface.
Odd Leonhardsen, DSG's chief science officer, also told Defense One that DSG is selling the bullets to governments around the world, but did not specify where — although he did mention that those countries were testing the bullets by firing them from a helicopter into water.
According to Defense One, .50 caliber CAV-X bullets can travel 60 meters underwater, and can go through 2 centimeters of steel fired from 17 meters away, indicating that it could be used to penetrate submarines.
How the bullets actually create the gas bubble is unclear, Popular Mechanics reports, but they could somehow harness the gasses created from the gunpowder when the bullet is fired. Popular Mechanics also reports that the bullets are being developed to be compatible with existing weapons, indicating that bullets can be used in and out of the water.
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