I have had no luck with firepistons. I have one by the best known maker and it's not exactly reliable.
The only bushcraft method I know is the bamboo fire saw. It helps a lot if the first time you try it is in the dry season (Jan-Mar), using sun-dried bamboo stems.
The bamboo parts you need to prepare before you start are:
- Crosspiece an internodal section split lengthwise into half. Shave the edges to remove the sharpness. Cut a notch in the outside at the middle running across the grain, and drill a hole using the tip of the bolo from the inside, meeting the notch on the outside.
- Tinder holder this is a thin (1/16) strip of bamboo about a inch wide and 6-8 inches long cut from the rest of the section used to make the cross piece. Bend it in the middle.
- Ember poker from the same piece of bamboo as the tinder holder, cut a thin chopstick-shaped piece and shave a needle like tip in one end.
- Tinder take a stem of bamboo about 4 feet long, and prepare fuzz by scraping the middle of the bolo up and down a section of stem, keeping the blade 90° to the bamboo. Scrape the hard outer layer off first. You should end up with two tufts at the top ad bottom that are combined and rolled between the palms to form a cigar-shape.
- Fire catcher This is a fuzz stick carved from bamboo under the part that you shaved the tinder from. Flip the blade over and pull up towards you, cutting long thin curls of bamboo. Then cut deep and cut out a stem to hold it by.
- Fire saw a stem of bamboo about 4 feet long, with a long scoop cut out of one section. This is usually starts as the hole that was created when you cut your tinder an fire catcher. Shave one edge a little thinner.
- Split bamboo for kindling. Use any shavings and scrap, any tinder remaining after previous failed attempts, ad stamp on some more dry bamboo too.
Making Tinder
The process itself is simple in principal, but it takes skill in practice.
Put the tinder roll over the hole in the cross piece and hold it on with the tinder holder held gently under the palms over the tinder.
Locate the notch over the edge of the saw and rub it in long, vigorous strokes up and down the saw. When after a few seconds, you see smoke, really go for it, then flip the cross piece over, poke the glowing ember into the tinder, blow hard on the ember until the tinder is glowing. Then apply the fire catcher, and with a few light breaths, it should catch light. Be careful that you dont blow out your flame when it catches.
Next quickly build a small fire with kindling and you are ready to brew a well earned tea.
If all else fails, bring out a lighter when nobody's looking.