The Mark II Bolt Rifle is still essentially the archetypal firearm of the Adeptus Astartes, but now re-engineered, re-crafted and perfected for use by the transhuman warriors of the newly-created Primaris Space Marines. This pattern of Bolter was named for its creator, Archmagos Dominus Belisarius Cawl.
Like all weapons in the Bolter family, the Bolt Rifle fires small, self-propelled missiles known as bolts which explode with devastating effect. The Bolt Rifle has a longer range and slightly more penetrating power compared to the standard-issue Bolter of the original Adeptus Astartes.
This Bolter variant is intended to be highly modular, allowing for variants like the Auto Bolt Rifle to be easily created, depending upon tactical need.