The Dark Trooper phase 4 was the fourth iteration of the Dark Trooper, though it was a battle armor developed in the Mandalore Imperial base as an upgrade over the third-generation Dark Trooper to be worn by Moff Gideon.
Forged from beskar alloy collected from Mandalore, the fourth-generation design borrowed heavily from Mandalorian armor philosophy, and incorporated a visored helmet, vambraces with integrated weaponry, and a jetpack. Additionally, the armor enhanced Gideon's strength, allowing him to deliver powerful blows and to crush the Darksaber in one hand.