MEC Gauss MiniGun

The Gauss MiniGun is a weapon in Fallout Tactics. The backstory of the gun in Fallout is that when the United States and China went to war over the last remaining reservoir of fossil fuels in the world, the US Army was able to make substantial advances by moving through Canada and Alaska and crossing to Asia over the Bering Strait, thanks in large part to the development of Power Armor that made the infantry practically invincible. To counter this, the Chinese developed the MEC Gauss MiniGun, which is capable of blowing through even the toughest foes.

You'll capture the Gauss Minigun in Scott City (on robot) and will be lacking for ammo for it for the rest of the game, so only bring it out for extremely special occasions.