A moustacherang is an boomerang made out of actual moustache hair. If deployed correctly, it can be a highly-effective combat tool. Particularly effective against Micro-scallywags as they are terrified of moustaches.
Dash usually has a quiver of moustacherangs in his backpack.
A man by the name of Bertram Crocker once tired manufacturing moustacherangs using synthetic moustache hair. They proved useless in combat and the experiment failed. He lost a lot of money.
The general rule is the older the moustache hair used, the better the moustacherang.
Using the moustache of someone who was themselves involved in combat can be helpful. So for example, if you are in a moustacherang emporium and you are deciding between two models:
 made from the moustache of retired cavalryman, or
 made from the moustache of a lawnmower inspector, which would you choose?
But older moustaches tend to be more powerful. So faced with this scenario below, you could have a problem:
You are in a moustacherang emporium and you are deciding between two models:
 made from the preserved moustache of cavalryman from 200 years ago, or
 made from the preserved moustache of a lawnmower inspector from 400 years ago.
A very difficult decision.
I would probably still go for 1.