The Blockhaus Schneider 75mm gun (Canon de 75 court modèle 1916 Schneider) was the primary armament of the Schneider CA 1 IFV used during World War I by the French Army, fired from its front right port. It was adapted from a trench mortar of similar size, adding a recoil compensator and gun shield for use as a fortification (blockhouse) gun. It was also fitted to the FT-75 BS tank—transforming the Renault FT into a self-propelled artillery gun.—and adapted for use as a mountain gun.