As you know, the Pyro doesn't talk and has not had a "meet the..." video yet. So in honor of him, in my collection of Team Fortress 2 Weapons, I'll be showing him first. More Team Fortress guns on the way.
Step 1: Flamethrower Part 1
Connect these 7 pieces together as shown
Step 2: Flamethrower Part 2
Take one of those rounded "T" pieces and cut the top end off and add a cone to the end and a slightly curved piece on the back
Step 3: Flamethrower Part 3
These parts form the handle
Step 4: Flamethrower Part 4
Connect the barrel and the handle and put two 1x2 w/ "+" hole bricks in between
Step 5: Flamethrower Part 5
These pieces form the gas chamber below the barrel. Put a 2x2 brick underneath the two + bricks. one the "X-Wing engine", put two flat 1x2 w' 1 stud pieces on opposite sides as shown
Step 6: Flamethrower Part 6
This forms the other side of the barrel. You don't have to use the bionicle hand, I was just using it for reference.
Step 7: Flamethrower Part 7
Put a medium bionicle gear into the opened end of the "x-wing" engine and put the pieces like this. the tube you see is, i think, a bionicle tube from one of the earlier sets
Step 8: Congratulations, Pyromaniac! You're Done!!!
Now in all your Bionicle MOC videos, you can make your character burn all his enemies to hell!