An evolution of the Thales 2R2M 120 mm semi-automatic mortar system, it can fire up to ten rounds per minute against targets up to 13 km away with improved accuracy; the vehicle can then set itself in motion while closing the roof hatches at the same time.

[3] As it can be put into road position as quickly as into battery, it is designed to avoid counter-battery fire more easily, while providing better protection for the crew.

The chief will switch from the front of the vehicle during the driving phase, to a position at the rear to command the battery and firing.

[2] MEPAC will also be integrated into the ATLAS (Automatisation des Tirs et Liaisons de l’Artillerie Sol/sol; English: Automated firing and ground-to-ground artillery links) artillery system, while retaining the option of firing in degraded mode (tube movement by manual pump, orientation by goniometer, manual loading from roof hatches and firing under manual control).

[3][2] 54 units are to be delivered to the French Army from the fourth quarter of 2023 to 2027, with a prototype scheduled for delivery as soon as 2020, and qualification testing expected to take place between 2022 and 2023.