Carapace Armor
Carapace armor is basically Flak Armor LV2. A bit tougher, and a bit more expensive. Usually given to commissars and stormtroopers. A step down from the Void Armor of the Great Crusade era. It is currently the best armor that non augmented humans outside of the Sisters of Battle and Inquisitors can get their hands on. Rarely it will also be worn by Lost and the Damned or a well equipped PDF.
Like Power Armor it has Ceramite molded into it's plates. This also makes it much heaver and will fatigue the wearer much faster than flak armor.