I made this bracer for a fellow larper for his character at Steam and Cinders.
The idea behind this bracer was to make something that could accept a phys repped fuel source in the form of one of those very tiny glowsticks. The glow stick can be inserted into the open end of the tube and sticks about half way out, which allows the glow sticks to be swapped quickly and easily.
The engraving on the upper edge of the brass is Farsi for justice.
The bracer is made from 8 oz veg tanned leather, sheet brass, brass rivets, brass studs, ecoflo dyes and finishing products.
you can also have a small dosimeter there. Outside or under a grid with bigger holes. To be realistic you'd have to cover/coat the naked metal areas with plastic. Better if you replace them by a polymer/nonmetallic composite actually.