Awful accuracy-but that's not the point. The Minigun unleashes a lethal stream of continuous bullets that can saw an incoming horde of enemies in half.
The Vault-Tec 9mm minigun is a big gun in Fallout: Brotherhood of Steel.
A post-War minigun designed by Vault-Tec Industries in the Secret Vault. The Vault-Tec minigun has a lower rate of fire than a general minigun but, unusually for a minigun, chambered in common handgun ammo. It has five barrels and it was used by the Attis army in Texas.
A very good weapon that remains until the end of the game.