In the early 1970s, AMX promoted a program to develop a new highly armored tank, armed with a powerful, fast-firing gun. Although the armor was traditional, the firepower was based on a new principle. The engineers planned to implement a hybrid gun with additional electrical power increasing the effectiveness of the solid propellant. The propellant gases were heated by an electric arc between electrodes on the barrel, improving combustion and boosting the shot power. The project was closed due to technical limitations.