​Tactical class “Mark X Tacticus" Master-Crafted Breastplate: The neck has changed, as it now has rivets around where it used to be smooth with a "U" shaped notch facing forward, making it distinct. Now it's the same as the common version's neck. However, moving a mouse over the image in the selection screen shows some indication that its mesh may be doubled over the prior model's (which would be preferable to duplicating the neckline of the common breastplate).