BattleTech Gorgon Protomech

The Gorgon BattleMech ProtoMech from BattleTech.  Say that five times fast.  No, not the planetary system, nor the Dropship class or the Dropship owned by Federated Suns, nor is it the Pinto-Class Warship, of Word of Blake, nor is it the Wagon Wheel Warship owned by Taurian Concordat, no indeedy it is the Gorgon Heavy Fire Support Unit ProtoMech.

From Sarna.net: The Gorgon is a heavy fire support unit that often anchors ProtoMech Points. Second only to the heavy Minotaur in armor protection, the Gorgon can stay in a fight until it has exhausted all its ammunition, which is its primary drawback. The Gorgon is also responsible for the practice of ProtoMechs carrying a "main gun" externally mounted to the torso and supported by the arms, a necessity devised by Clan Smoke Jaguar engineers given the size of its primary weapon.