The Dark Trooper gear is a group of three gear sets (red, gray, and white) that were realesed and can only be found within the realese of the Sith Cargo Crates. All are a re-paint of Phase II Clone Troopers.
Red Dark Trooper
This version of Dark trooper gear is grey with red and black lines throughout
Gray Dark Trooper
This Dark trooper gear, contrary to its name, is mostly black with small grey lines throughout
White Dark Trooper
This Dark trooper gear is a mix of white and black with grey lines running througout. You can get it from sith crates.