I’m building my fourth squad of Plague Marines. I’ve two ranged squads and one melee squad so I’m adding another ranged unit. A squad of seven Plague Marines can have two of the Plague Marines with a heavy weapon. I tend to stick with either Plasma Guns or Blight Launchers and tend to equip both Marines with the same weapon. The box of Plague Marines comes with one Plasma Gun and one Blight Launcher. When I built the Melee equipped squads those weapons went into my bit box. So when building this new squad I thought I’d use them. That way this squad can either have two Plasma Guns or two Blight Launchers with the models carrying the appropriate weapons.