Anduril posted a 16-second video of its Copperhead-500M underwater munition at sea on 25 April 2026. The caption said it “broke internal speed records” while manoeuvring in high seas, The Aviationist reported. It gave no speed, date, place or target.
The 500M is a model name, for the 21-inch, heavier member of the Copperhead family, not a dollar figure. Anduril has said the family runs at more than 30 knots and costs “a fraction” of a Navy Mk 48 torpedo, without giving a price.
The munitions are meant to be carried by Anduril’s larger underwater drones. Anduril says its Dive-XL can carry dozens of the smaller Copperhead-100M or several 500Ms.
No government customer has been named. “We cannot talk publicly about who we’re working with on the government side,” Shane Arnott, Anduril’s vice president of programs and engineering, has said. Nor has any contract or test result been published since the April video.
