Brass

[bras, brahs]

  • An alloy of approximately 2 parts copper and 1 part zinc, which because of its combination of strength and ductility, is commonly used for making cartridge cases, which fit easily into the chamber of a firearm and then when discharged, expand to seal the breech. Also, slang for cartridge cases.
  • A slang term for an empty shell casing. Most shell casings are made of the metal alloy known as brass.