Burnmaster (Fallout 3)

The Burnmaster is a special Flamer in Fallout 3. To find this weapon, first go to the Falls Church/Mason District Metro Station (Be careful as this station is filled with Feral ghouls). Don't go up the stairs to the second level like you would to get to Hubris Comics, but stay down and go into the train tunnels. It will curve around past a couple of Glowing Ones and there will be an entrance to a utility tunnel. Go in there. Follow that until you get to where the tunnel goes down into the water. Go into the water and then make a left through a broken passage in the tunnel. Swim for a bit until you find a ramp that goes up. Continue down a hallway filled with radioactive barrels and 2-3 Glowing Ones. At the end are 4 ammo boxes filled with flamer ammo and the Burnmaster.