The heavy mag cannon is a larger and more powerful version of the standard mag cannon. A target struck and penetrated by a heavy mag cannon suﬀers massive internal damage and is unlikely to survive.
Whilst they both serve the same role; the heavier mag cannon it far more potent with dealing with bigger targets. To separate their role, use the standard Mag Cannon for dealing with standard and light infantry, and be able to keep light vehicles pinned. The heavy Mag Cannon can easily take out heavily armoured infantry, and medium and heavy vehicles.
Models supplied unassembled and unpainted