RAMBO Build & FIRE STARTER- from High carbon Bolt

First I take a high tensil steel bold and soften the steel with a gas torch. I could have skipped this but it makes the steel softer to send and file.
the 16mm bolt is made to fit a standerd 13mm drill chuck by removing the threads, this means I can use the drill as a lathe to make vertical cuts. A 3mm tap is then added to the 2.5mm hole.
After cutting, grinding and sanding I harden the blade by heating it back up and quenching it in oil. It is now very very hard and a file just skates off, but slightly brittle. As I will be hitting the edge of the blade, I anneal the steel in an electric oven for 2 to 3 hours.
many coats of matel 'blue' are added and I use a knife sharpener to reveal and sharpen the two edges of the blade, just like the movie version.

Finally a ferro rod it filed to the correct size in the drill and added inside the handle of Rambo's knife this is capped with a M3 hex nut with the corners removed. I am now john Rambo.

the tank used in the video is a heng long type 41 1/16 scale remote control tank.

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