What is the best weapon in Fallout 3?

3 Terrible Shotgun are the 10 Best Unique Weapons. There was a person who said 4 Jingwei's Shocksword. There were 5 revenges. There are 6 Lincoln repeaters. The rifle is called 7 Xuanlong. There were 8 experimental MIRVs. The gun is a darts gun. One of the worst guns in the game is the Dart Gun. The 10th Callahan's Magnum. The strongest weapon in the game is Callahan's Magnum.