Homemade broadheads

[T-oddity]

I just scan read this thread so if I mention something already posted I apologise, I've done a bit of arrow head making, you can use just about anything to hand the only thing that restricts you is your imagination.
traditionaly: hardwoods, bone and flint
A modern alternative to flint is glass, loads of demos on you tube and a great way to practice napping.
This is one of many, not that hard a skill just needs practice.
http://www.youtube.com/watch?v=xh7pc2Q6XFI

As far as keeping things simple and an abundant supply, 45 gallon oil drums, the mild steel they are made from is just over 1mm thick easy to work with hacksaw, file, jigsaw or grinder to make into any shape you want.
Thinking outside the box hard plastics from car bumpers wings ect, supprisingly effective, against flesh anyway!