DAHL Defense Cannon are turrets encountered in the Guns, Love, and Tentacles DLC for Borderlands 3.
Background
The Dahl Defense Cannon is described by Gaige as a Vulture-class railgun. When spotting a target, the gun will charge up and fire a small but very dangerous ball of plasma. All turrets come with shields. Two are seen mounted on a defense post guarding the path to the Dyad. One is found and used by the Vault Hunters to blow open a closed security gate to the Dyad. Two are mounted under the hull of the abandoned ship as point defense turrets.