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The '''Mole Mortar''' is a heavy support weapon that was available up to until [[Warhammer 40,000 3rd Edition Rulebook|3rd Edition]] where when it disappeared. It is basically an inverted [[mortar]] with that fires a shell burrowing sub-surface missile, or 'tunnel-torpedo' which tunnels through , into the ground. The missile burrows its way toward its target, bypassing all surface hazards and defenses, emerging from the ground underneath beneath the battlefieldtarget. It was originally developed The missile is self-guided and able to attack tunelling vehicles but was then used as a short range assault weapontrack its target through solid rock.

It The mole mortar is notoriously inaccurate an invention of the [[Squat]] Engineers Guild, and has a temperamental fuse, either exploding below ground, just after breaking the surface or in been adopted by the air[[Imperial Guard]].

The Mole Mortar presents Imperial tunneller technology at its most practical. Originally developed in the [[Dark Age of Technology]], the Mole Mortar was mole mortar is sometimes used to breach fortifications too strong for conventional weaponry to damage. Due to the unique way it operates, the Mole Mortar was mole mortar is able to circumvent most defences, striking from below to explode within bunkers and other structures. Mechanicus [[Skitarii]] armies favour the Mole Mortar mole mortar as a close support weapon, allowing them to strike unexpectedly at the most heavily-armoured enemy, and allowing the Skitarii infantry to exploit the confusion sown in the enemy lines.