Gravis Armour
Codex: Space Marines, p. 9
Gravis Armour is a bulk multi-layered heavy assault Armour for Primaris. It provides a 3+ Armour save and grants the wearer +1 to their Toughness (T) characteristic. The wearers Movement (M) Characteristic is decreased by 1". The model gains the Bulky (2) special rule. If a model wearing Gravis Armour is hit by a weapon with the Blast or Large Blast special rule, decrease the AP of the weapon by 1 (e.g 3 becomes 4) for the purposes of resolving that hit. The model gains the Relentless Special rule.