Manufacture d'armes de Saint-Étienne
The Manufacture d'Armes de Saint-Étienne, often abbreviated to MAS ("Saint-Étienne Weapons Factory" in English), was a French state-owned weapons manufacturer in the town of Saint-Étienne, Loire. Founded in 1764, it was merged into the French state-owned defense conglomerate GIAT Industries in 2001.
Source: Wikipedia — Manufacture d'armes de Saint-Étienne (CC BY-SA 4.0)