Warhammer 40K: Space Marines - Infiltrator SquadClad in Mk X Phobos pattern armour, the light and fast moving Primaris Infiltrators are responsible for disrupting enemy communications and sabotaging targets of opportunity. The first the enemy sees is a cascade of choking smog as the Infiltrators hurl a barrage of smoke grenades, masking their advance. As the foe peers into the swirling cloud, the Space Marines bring their targets down with disciplined bursts of fire, the augur scopes of their