Extremely heavily armoured, their silhouette is wider and chunkier than most Primaris Space Marines, with the flamestorm gauntlets they carry adding to the sense of absolute aggression. Each miniature features details such as the promethium tanks for the flamestorm gauntlets attached to their backs, with fuel lines and pipes, and each features a reliquary. One of the models is a Sergeant, bedecked with extra detail – more purity seals and skulls feature on him.