Practice Bomb Signals Mk 4 Mods 3

Description

The cartridge case of the Mk 4 Mod 3 is extruded aluminum instead of paper from other models; a primer mixture with improved storage characteristics and a new pyrotechnic load.

When the practice bomb in which the signal is installed strikes water or the earth, impact causes the firing pin in the nose of the bomb to impinge upon the primer of the signal. The primer ignites the expelling charge, forcing the marker load out through an opening in the bomb. The resulting flash and puff of white smoke permit observation as to bombing accuracy.

Great piece of history. Cannot ship Internationally!