Scanned Alone
Uncommon35.5%ObjectiveOptionalSingle-player
Single Player
Stand in a defective turret detector
Chapter 5, in the turret factory control room. Pull the master turret out of the template scanner (the one the factory copies every turret from) so the scanner reads empty, then step into the scanner yourself. You'll be sabotaging that template as part of the story anyway - just make sure it's you standing in the beam when it fires.