Each Mortifier is equipped with two ranged weapons chosen from heavy bolters or heavy flamers and two melee weapons chosen from penitent buzz-saws or penitent flails. Any Mortifier can instead be assembled as an Anchorite. Alternatively, each kit can build a Penitent Engine, which are equipped with heavy flamers instead of heavy bolters.

The kit comprises 126 components and includes all of the weapons and assembly options for all three variants. The model comes supplied with 2x Citadel 50mm Round Bases.