Learn history online by signing up for a free 7-day trial at http://www.americanhighschool.org Chauchat Light Machine Gun The First World War The ‘Chauchat’ or "Fusil Mitrailleur Modele 1915 CSRG" was the standard machine rifle or light machine gun of the French Army during World War I. Country of Origin: France Caliber: 8×50mmR Lebel Weight: 9KG /20lb Rate of Fire: 250 RPM Range: 1000 m / 3300ft