This meant a system that used a blank firing replica gun, and a system to detect blank rounds being fired. Very cool, and the way he went about it includes some interesting electronics.

Also, non-firing ceremonial guns or race-starting pistols can be modified to fire bullets ... of deactivated weapons and conversion of blank-firing firearms are among the main sources of illegal ...

Owners of particular types of blank firing guns, which have become popular with ... alongside thousands of rounds of blank ...