Carapace armour
From Lexicanum
Carapace armour is used within many forces of the Imperium, including the Imperial Guard and the Adeptus Arbites.
Carapace armour consists of large rigid plates of armaplas or ceramite molded to fit parts of the body. It can range from complete armoured suits like those worn by the Adeptus Arbites to individual pieces such as chest plates, helmets, etc.
Effects and Distribution
Carapace armour is stronger and thicker than Flak armour, and it gives the wearer more likelihood of surviving a direct impact with standard small-arms rounds (though it does little to protect against stronger weapons).
Carapace armour is used within many Imperial military forces, including the Guard and Navy. The carapace breastplate worn by Guard officers is as much a symbol of rank as armour.
Regular guardsmen will usually be equipped with the cheaper and simpler flak armour, although there are several Imperial Guard regiments where carapace is the standard armour. Its notable disadvantage is that it can be tiring to wear in extended battles.
