Simplify the following text for a Grade 11 native English-speaking person.
Original: Debuted at the Eurosatory 2004 military trade show in Paris , a derivative of the system for use against armored vehicles is designed to fire Panzerfaust anti-tank rockets .
Simplified: First shown at the Eurosatory 2004 military trade show in Paris , based on the system for use against armored vehicles is designed to fire Panzerfaust anti-tank rockets .