Tarantula
One of the objects most beloved by the men and women of the Imperial Guard is the Tarantula. Its an automated gun turret used to defend strategic posistions. This means that their is a gun defending them from green skinned soccar holigans playing Junkyard Wars barbarian addition, crazed chaos cultists or space elf dickholes at the front lines, but they don't have to be in harms way. Can be fitted with both lascannons and heavy bolters.